1.

1). Produces2).3). Product4). Purchase

Answer»

?The sentence TALKS about revenue. So, the blank must CONTAIN a verb that MEANS 'generating', or 'producing'. Now, options 1 and 2 both use different forms of the verb 'to produce'. But, as the sentence uses the PLURAL noun 'duties', the corresponding verb must be present in its normal present tense form 'produce'. Therefore, the correct answer is option 2.



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