In the first 5 overs of a cricket game, the run rate was only 2.1. What should be the rate in the remaining 30 overs to reach the target of 200 runs?  Choose the correct answer:
A) 6.25
B) 6.28
C) 6.31
D) 6.19
E) 6.21

Rationale: "required run rate = [ 200 - ( 2.1 * 5 ) ] / 30 = 189.50 / 30 = 6.31 answer : c"
Answer: C