The correct answer choice should be C. The adverbial phrase is In complete silence. It describes HOW the test should be taken
In A: it should be "I was" not "I were".
In B: it should be "lately you appear" not "you appears"
in C: this is correct! the subject is in agreement with the verb, and this is the correct answer.
in D: it should be "you are"
It can be very true in most cases but it all depends on the persons mood or feelings
Answer:
The figure of speech is personification.
The authors purpose is the answer that you want.
