A certain school implemented a reading program for its students, with the goal of getting each student to read 7 books per month year-round. If the school has c classes made up of s students in each class, how many books will the entire student body read in one year? Options:
A) 20 cs
B) cs / 2
C) 84 cs
D) ( 2 cs ) / 12
E) ( 24 c ) / s

Rationale: ans : c solution : simple multiplication s students , c classes , 7 books / month = 84 books a year total number of books = 84 cs
Answer: C