Movie tickets at a small theater are $5 for children, c, and $8 for adults, a. On a certain day, 400 people go to the movies and the movie theater collects $2,825.
This situation can be represented by the following system of equations:

c + a = 400
5c + 8a = 2825

​How many children attended the movie theater on that day?

Group of answer choices

A-275

B-125

C-118

D-358