B. adverb clause
Only one of the sentences contain an adverbial clause. I lay out the explanations below.
<span>(A) NO ADVERBIAL CLAUSE. "Where I could get some coffee" is part of a reported speech. </span>
<span>(B) NO ADVERBIAL CLAUSE. "What she pointed out" is a noun clause. </span>
(C) NO ADVERBIAL CLAUSE. "How to invest my money" is the direct object of know; hence, it's a noun clause.
<span>(D) </span>"Where they can find food easily"<span> is an example of an adverbial clause. It is an adverb of place, answering the question: Where do most animals thrive?</span>
I believe that it would be A because first, it is putting the more scientific name and than adding on to it saying the better-known name.
Answer:
1- were tested
2- stayed in the same
3- switches to a different