D. The phrase is everything before the comma. The participle is crunching, popcorn is the subject of the phrase, and rest is an adverb phrase.
The participial phrase in the sentence is 'Crunching popcorn the whole time,' where the first word is 'Crunching' and the last word is 'time.' The best answer choice from the provided options is B, 'crunching popcorn,' which includes the first word. This option captures the essence of the phrase while adhering to the question requirements.
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