Use the Range Rule of Thumb to Approximate the Standard $15,42,53,7,9,12,14,28,47$

Multiple Choice

Use the range rule of thumb to approximate the standard deviation.
- $15,42,53,7,9,12,14,28,47$

A) $29.1$
B) $15.8$
C) $11.5$
D) $16.6$