Choose the option that corrects the error in the underlined portion. If no error exists, choose "No change is necessary."

Bill, the foreman of the construction company, is concerned about the safety in the large building. They have had three accidents in the past week.
Question 9 options:

a)

It has had

b)

She has had

c)

Members of the crew have had

d)

No change is necessary.

The correct answer is c) Members of the crew have had.

The pronoun "they" in the original sentence does not have a clear antecedent. "They" should refer to a specific noun or group of people. Option c) clarifies that it is the members of the crew who have had three accidents in the past week.