Answer:
<em>D. To explain the origin of Dorothy's slippers and the Wicket Witch</em>
The subject here is simple" it's just "Antarctica" .
The verb is also not compound, it's a simple verb: "has".
The compound part of the sentence is the object: it is: "a thick ice cover and the highest average elevation of all the continents"
so the correct answer is "compound subject"
What's the excerpt? more details
adjective :
Explanation:The preposition, its object, and any modifiers make up the prepositional phrase. Prepositional phrases most often function as adjectives or adverbs. ... Remember that an adverb modifies a verb, and adjective, or another adverb; and it tells when, where, why, how, under what condition, to what extent.
