The distance between stone bound "A" and stone bound "B" was measured 9 times. The most probable value was calculated to be 10,654.210 feet. The standard deviation "S" was calculated to be +/- 0.300 feet. What is the value of the standard deviation of the mean?

A.) 0.100 feet

B.) + 0.111 feet

C.) + 0.100 feet

D.) + 0.033 feet