The current in a wire is 4.0 amperes. the time
required for 2.5 × 10^19 electrons to pass a certain
point in the wire is
(1) 1.0 s (3) 0.50 s
(2) 0.25 s (4) 4.0 s

The correct answer is option 1. 

To solve, you will first multiply 2.5x10^19 times the charge of an electron (1.6x10^19). Then, see what you need to divide it by (in seconds) to get to 4. The answer that gives you 4 (the number of amperes) is the correct answer. 

Since 2.5 x 1.6 = 4, you would only have to divide it by 1 second. 

Then the answer would be d then