A

is used to show a large pause or interruption in thought within a sentence.
A comma does not make sense because all a comma does is separate elements in a sentence; a colon separates thoughts and/or enumerations.
Thus, dash was the only reasonable answer.
You're welcome.
Answer:
Statement: The friendship of the good
Explanation:
Aristotle sees real friendship as a virtue, in the sense that the <em>friendships of virtue </em>take time and trust to build. Because of their slow and gradual development these relationships, in order to endure over time, require a base level of goodness in each person to start with. Without this virtue of goodness real friendship is impossible.
Answer:
C
Explanation:
By definition, irony is a state of affairs or an event that deliberately is contrary to what one expects and is often amusing as a result. A very powerful vampire choosing to not use his power and instead being vegetarian fits this definition. However, A and D, are neither surprising or humorous. B was actually a very common affair between aristocrats and is therefore neither surprising or humorous. This leaves C as the answer.
a name is a proper noun, so yeah you were on track there