Verb is a figure of speech that does action. In addition, a complete verb can include adverbials and prepositions. In this example, the action word is 'go'. But if we are talking about the complete verb, the answer should be 'will often go". This phrase altogether gives Sue not only an action, but also the frequency of the action.
This is an example of a cause and effect relationship.
I believe the answer is A, because Gandalf was angry that Butterbur was delaying in bringing him news
A. a proper noun is usually more specific than a common noun
