Number one should be C, I think the second one is D, third one is D, fourth one is D as well I think, and number five should be A. Tell me if I am incorrect, I hope this helped you out :)
In B, "walk" is not a preposition, It's a verb >>we reject the answer.
In C, "wither" is not a preposition. >>we reject the answer.
In D, "whale" is not a preposition, it's a noun. >>we reject the answer.
so A is the correct asnwer!
ps. it there are also other problems in the rejected answers, for example, "wonder" is a verb, but one false word is enough, so I just gave an example.
The answer is C, overcoming :)
The tone influences how a reader is going to emotionally respond to the piece of literature. It will affect how the reader perceives the writers intentions.