B. Product now; in the given sentence the underlined phrase modifies the product now.
More about modify:
A modifier is a linguistic term for an optional element that affects the meaning of another element in a phrase or clause. For instance, the adjective "red" serves as a modifier in the noun phrase "red ball," adding further information about the specific ball being discussed.
The verb phrase "ran rapidly" also uses the adverb "quickly" as a modifier. Modification can be compared to predication and reference as a high-level realm of linguistic operations. There are two type formal and functional.
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