B, they already are quoting it by saying "the source states". I believe quotation marks at this point are not necessary
Answer:
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Answer: gently
Explanation: an adverb is a word that serves as a modifier of a verb, an adjective, another adverb, a preposition. so in this case the adverb "gently" is modifying the verb "touch".
America constitutes the majority of native English speakers. The factors that affect the evolution of American English are <span>linguistic, geographic, socio-economic, and political.</span>