### Break Down the Problem
1. Identify the context of the sentence regarding the prototypes of smartwatches and what action was taken before mass production.

### Relevant Concepts
2. The sentence is looking for a past action that was performed on the prototypes prior to their mass production.

### Analysis and Detail
3.
- Option (a) "continued" does not fit well as it implies ongoing action rather than a past test.
- Option (b) "tested" suggests that the prototypes underwent a validation process, which is logical before mass production.
- Option (c) "experimenting" suggests a process but is less formal and does not fit neatly in the tense.
- Option (d) "investigating" implies research rather than a direct action on prototypes.

### Verify and Summarize
4. The action that would normally precede mass production for product development is testing, making (b) the most appropriate choice.

### Final Answer
The correct answer is **b. tested**.

Question

### Break Down the Problem
1. Identify the context of the sentence regarding the prototypes of smartwatches and what action was taken before mass production.

### Relevant Concepts
2. The sentence is looking for a past action that was performed on the prototypes prior to their mass production.

### Analysis and Detail
3. 
   - Option (a) "continued" does not fit well as it implies ongoing action rather than a past test.
   - Option (b) "tested" suggests that the prototypes underwent a validation process, which is logical before mass production.
   - Option (c) "experimenting" suggests a process but is less formal and does not fit neatly in the tense.
   - Option (d) "investigating" implies research rather than a direct action on prototypes.

### Verify and Summarize
4. The action that would normally precede mass production for product development is testing, making (b) the most appropriate choice.

### Final Answer
The correct answer is **b. tested**.

Knowee AI · Accepted Answer

### Break Down the Problem
1. Identify the context of the sentence regarding the prototypes of smartwatches and what action was taken before mass production.

### Relevant Concepts
2. The sentence is looking for a past action that was performed on the prototypes prior to their mass production.

### Analysis and Detail
3. 
   - Option (a) "continued" does not fit well as it implies ongoing action rather than a past test.
   - Option (b) "tested" suggests that the prototypes underwent a validation process, which is logical before mass production.
   - Option (c) "experimenting" suggests a process but is less formal and does not fit neatly in the tense.
   - Option (d) "investigating" implies research rather than a direct action on prototypes.

### Verify and Summarize
4. The action that would normally precede mass production for product development is testing, making (b) the most appropriate choice.

### Final Answer
The correct answer is **b. tested**.

The prototypes of the smartwatches were _____ before mass production.Question 9Select one:a.continuedb.testedc.experimentingd.investigating

Question

The prototypes of the smartwatches were _____ before mass production.

Solution

Break Down the Problem

Relevant Concepts

Analysis and Detail

Verify and Summarize

Final Answer

Similar Questions

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