I don’t know what kind of rhyme you are going for but it sounds good!!
When he says "My will to her consent is but a part; An she agree, within her scope of choice Lies my consent and fair according voice." He is saying here that his consent to Juliet and Paris' marriage is "but a part" of the decision, so he believes that her choice is also needed. He says that, while his "consent and fair according voice" may play a part in her choice, she still has a choice, free will.
You would just put the last name only in the parenthesis.
For Example: (Franklin D. Roosevelt)
Hope this helps!
The correct answer is C.
The question was answered by the helper (passive).
The heper answered the question (active).
