Answer:
The correct answer is letter A) conjunctive adverb.
Step-by-step explanation:
In the sentences we are studying here, the word "however" is a conjunctive adverb. This type of adverb is used to join clauses and to express contrast, cause and effect, or sequence. "However" expresses contrast. When we place a conjunctive adverb between two independent clauses, we need to use a period or a semicolon before it. Let's remember that an independent clause has a subject and a predicate, and is able to express a complete thought on its own.
That is precisely what we have here. There are two independent clauses, "I did not wish to attend the silent auction" and "I definitely wanted to attend the banquet beforehand", joined by a semicolon and a contrast conjunctive adverb "however".