Explanation:
(a letter Sodapop gave Dallas to pass onto Ponyboy while he was staying at the church, because Soda knew Dallas knew where the boys were)
It's more important to what a person does because as they say, actions speak louder than words do. A person can think a certain way but not act on it but what a person does reflects what they decide internally and what they wanted to do with that idea externally showing that they are serious with that idea of theirs in their head.
B) She demonstrates cleverness, because suitor means, boyfriend/girlfriend, so she is telling her future possibilities to hold a contest.
A dictionary is a source that would most likely provide a word's etymology.