What each man to the sum of knowledge is what counts. a. contributed b. contribute c. contribution d. distribution e. contributions f. distributed g. contributes

G) contributes

Explanation:

The statement is an opinion told in the style of being a universal truth/saying or a quote; hence Present Indefinite tense is used. Also the use of Present tense in second clause (is what counts) requires the use of present tense in first clause. So, options A and F are incorrect (because they use Past tense).

In Present indefinite tense, we add s/es after verbs when the subject of the verb (man) is singular, so option B is incorrect.

Moreover the sentence structure requires use of a verb after the subject (man), hence options C, D, and E are incorrect (they have nouns).

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