Each day a worker (M) produces 100 goods with a standard deviation of 5, while another worker (N) produces 200 goods with a standard deviation of 15. Which of the following statement is correct?

A. Worker M has lesser variability with coefficient of variance at 5%

B. Worker M has higher variability with coefficient of variance at 7.5%

C. Worker N has lesser variability with coefficient of variance at 5%

D. Worker N has higher variability with coefficient of variance at 7%

Answer: Option A