Upon my head they placed a fruitless crown, and put a barren scepter in my gripe, Thence to be wrenched from an unlineal hand, No son of mine succeeding."
<span>The
adverb phrase used in the sentence above is where
oases are plentiful but distant from each other.</span>
<span>It consists of a word “where” which denotes the
place of occurrence that adds information about the word it modifies. Adverb
phrase usually begins with subordinating conjunctions and contains subject and
predicate.</span>
The correct answer is B. This is because it offers a detail in relation to the main idea, whereas the other options do not.
Hope this helps.