The number of computer engineers _________ increasing every year.(A) is(B) are(C) has been(D) have been

To determine the correct answer, we need to analyze the subject-verb agreement in the sentence. The phrase "the number of computer engineers" is key to identifying the correct verb form.

1. Identify the Subject:

   • The subject of the sentence is "the number," which is singular.

2. Determine the Appropriate Verb Form:

   • Since "the number" is singular, it should be followed by a singular verb. Therefore, we are looking for a singular form among the choices provided.

3. Review the Options:

   • (A) is - singular
   • (B) are - plural
   • (C) has been - singular
   • (D) have been - plural

4. Consider the Tense:

   • The phrase "is increasing" suggests a present continuous tense, indicating that it is currently happening.

5. Confirm the Correct Answer:

   • The appropriate verb form that agrees with the subject "the number" is (A) is.

Final Answer

The correct completion of the sentence is: "The number of computer engineers is increasing every year."