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OpenStudy (anonymous):

c

OpenStudy (anonymous):

By using the process of elimination and making an educated guess you can eliminate the answer choices A and D. Synonyms of the word 'Catalyst' are, 'stimulus' or 'spark' I'd narrow it down to B or C and choose one of those.

OpenStudy (anonymous):

Hmm, I take back what I said about eliminating D. For, B, although 'catalyst' is used in chemistry, I don't think it's related to this sentence. Sorry for all these scattered thoughts and not be able to help much.

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