There has been an increase ___ sales after the company hired new workers.a) withb) inc) ofd) on

To determine the correct option to fill in the blank, let's analyze the context and the prepositions:

1. Understanding the Sentence: The sentence states that there is an increase "___" sales after hiring new workers. The blank should be filled with a preposition that correctly conveys the nature of the increase.

2. Evaluating the Options:

   • a) with: This preposition doesn't fit well in this context.
   • b) in: This option is appropriate as it indicates an increase in a particular area, in this case, sales.
   • c) of: This does not convey the correct relationship in this context.
   • d) on: This is also not commonly used with the noun "increase" in this context.

3. Conclusion: The best option to fit the blank in the sentence is "in".

Final Answer

The correct answer is b) in.