Final answer:
The correct answer is 'a. will he win the race?' as it follows proper English interrogative sentence structure. Furthermore, asking about an applicant's birth state during a job interview is illegal in the United States.
Step-by-step explanation:
The correct interrogative sentence from the given options is a. will he win the race? This sentence is properly structured to form a question in English grammar. The subject 'he' is followed by the correct modal verb 'will' and the base form of the verb 'win' to ask about a future event or outcome. The interrogative form typically places the modal verb before the subject to indicate a question.
On a side note, one of the provided questions related to job interviews is indeed illegal in the United States. It is illegal to ask about an applicant's birth state as it could lead to discrimination based on national origin. Therefore, the correct answer to question 5 is b. Which state were you born in?
Selecting the correct verb to complete each sentence requires understanding subject-verb agreement and the appropriate tenses based on the context of each sentence. A complete list of sentences with the appropriate verb forms would demonstrate this.