The phrase 'now available' modifies the word 'product' in the sentence. It indicates the current state of availability for the hair-care product. This shows how modifiers can provide essential details about the nouns they describe. ;
The phrase 'now available' in the sentence modifies the word 'product', indicating the current state of availability. This shows how modifiers provide important details about nouns. Therefore, the correct answer is option B, 'product'.
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