Hello there!
Your answer would be A). Conduct a mock interview with the help of family or friends.
The reason why "A" would be your answer is because if Timothy runs through a interview that closely replicates what the actual interview will be like, you would feel more confident because you would know how the interview is like. This is just like rehearsing for a big play, you would practice, ore rehearse the same way like if it was the actual big day, this applies to interviews too. Getting a family member of friend to act as the interviewer, while asking you questions would help better your confidence on the way you respond to the questions, and gives you a little taste of what it's like.
Lets dive in to why the other answer choices are incorrect:
Answer choice "B). Take a nap before the interview" would be incorrect because taking a nap before an interview will do Timothy no good. Timothy would just wake up nervous again. Taking a nap before an interview will not boost up Timothy's confidence, due to the fact that he will wake up feeling nervous again. It would be better off for Timothy to practice with someone rather than taking a nap before an interview.
Answer choice "C). Prepare a script for the interview" would be incorrect because you really aren't suppose to bring a script to an interview. if Timothy brings a script to an interview, it will show the interviewer that he is not capable of taking on a task that involves his communication, and shows that he can't be prepared, that's a huge down fall into getting the job. If he can't be prepared for an interview, how would he be prepared for the job that they might assign him? Practicing before hand and going to the interview without a script would make him look more professional and well prepared.
Answer choice "D). Call to reschedule the interview" is incorrect because this will ABSOLUTELY NOT help boost his confidence up, assuming that this answer choice is talking about pushing the interview date farther, it would only make him feel less confident, or increases his anxiety. This is where the term "Do it early, and get it over with" comes into play. It would be better off doing an interview earlier than later, since hw would feel more determined to accomplish the interview. But, even if he tried to reschedule the interview a litter more earlier, than would make him feel less confident since he wouldn't have more time to practice for the interview.