At Netflix, the Time It Takes for a Returned DVD

Multiple Choice

At Netflix, the time it takes for a returned DVD to be re-filed and for the next DVD to be submitted for shipping to the customer follows a bell-shaped pattern, with a mean of 194 seconds and a standard deviation of 42 seconds.What proportion of the "turnaround" times are between 200 and 220 seconds?

A) .1767
B) .1986
C) .2540
D) .3121
E) .2242