Select the most appropriate option to improve the highlighted segment in the given sentence. If there is no improvement required, select ‘No improvement’.
The captain as well as the entire crew have reached the harbour safely.

Correct option is A

The correct substitution of the highlighted words is (a) has reached.
· The phrase "as well as" is a parenthetical expression that does not affect the subject-verb agreement. The subject of the sentence is "The captain," which is singular. Therefore, the verb should also be singular, "has reached," not "have reached."
· Grammatical rule used: When the subject is singular, and a phrase like "as well as" follows it, the verb should agree with the singular subject, not with the phrase that follows.
· Example: "The teacher, as well as the students, has completed the project." Here, "has" is correctly used with the singular subject "teacher."