I believe that A and B are correct.
The sentence in which the adverb clause modifies an adjective is the second one - The veteran appeared proud as he saluted the flag.
The adjective here is <em>proud</em>, and the adverbial clause is <em>as he saluted the flag. </em>As you can see here, that clause is describing the adjective in more detail.
When did the veteran appear proud? - As he saluted the flag (it obviously modifies the word <em>proud</em>)
That ice cube is intensely icy as it itches it's way melting down.
(Thought of this real quick sorry if it sounds a bit weird.)
Answer:
<em>Adjective :</em>
It represents a noun or pronoun.
Example : He is a good worker.
Adverbs :
It represents a verb or anything apart from a noun and pronoun.
Example : He works well.
Explanation:
