In a Certain Material There Is a Current of 16

Multiple Choice

In a certain material there is a current of 16 A flowing through a surface to the right,and there is an equal amount of positive and negative charge passing through the surface producing the current.How much negative charge passes through the surface?

A) 8 C/s toward the right
B) 8 C/s toward the left
C) 16 C/s toward the right
D) 16 C/s toward the left