$\text { Average Daily Temperatures in Moorhead, Minnesota }$

$\text { Average Daily Temperatures in Moorhead, Minnesota }$
$\begin{array} { | l | c | c | c | c | c | c | } \hline \text { Month } & 1 ( \mathrm { Jan } ) & 2 ( \mathrm { Feb } ) & 3 ( \mathrm { Mar } ) & 4 ( \mathrm { Apr } ) & 5 ( \mathrm { May } ) & 6 ( \mathrm { Jun } ) \\\hline \text { Temperature } \left( { } ^ { \circ } \mathbf { F } \right) & 6 & 14 & 26 & 43 & 57 & 66 \\\hline \text { Month } & 7 ( \mathrm { Jul } ) & 8 ( \mathrm { Aug } ) & 9 ( \mathrm { Sep } ) & 10 ( \mathrm { Oct } ) & 11 ( \mathrm { Nov } ) & 12 ( \mathrm { Dec } ) \\\hline \text { Temperature } \left( { } ^ { \circ } \mathbf { F } \right) & 71 & 70 & 58 & 46 & 27 & 13 \\\hline\end{array}$
-During which of the following periods was the rate of change of the average daily temperature the smallest?

A) [2, 6]
B) [4, 8]
C) [4, 9]
D) [6, 10]
E) [8, 10]
F) [9, 10]
G) [10, 11]
H) [11, 12]