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They would react astonished most likely, they don't know what to expect. Yet this is very true most will deny it.
Answer:
C. of ice particles
Explanation:
The phrase of ice particles is a <em>prepositional phrase</em> because it consists of a preposition, <em>of</em>, its object, <em>particles</em>, and another word, <em>ice</em>, that modifies the object of the preposition. This prepositional phrase functions <em>as an adverb</em> in the sentence since it modifies a verb, <em>made</em>. Therefore, the prepositional phrase of ice particles is also an <u>adverbial phrase</u>.