physics ---- really dnt get this at all

A total charge of 25 mC passes through a cross-sectional area of a nichrome wire in 10 s. How many electrons pass through the cross-sectional area in 16 s?
Choose one answer.
a. 2.5 x 1017 electrons
b. 2.5 x 1019 electrons
c. 2.5 x 1016 electrons
d. 2.5 x 1021 electrons

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  1. the answer is (a) im taking a test with this question

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