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Abner and Abijah are brothers who own a painting business together.

The mean amount of time it takes Abner to paint a medium sized room is $5.59\text{ hours}$ with a standard deviation of $0.63\text{ hours}$.
The mean amount of time it takes Abijah to paint a medium sized room is $6.11\text{ hours}$ with a standard deviation of $0.45\text{ hours}$.

Assuming the amount of time it takes each brother to paint is independent, which of the following is closest to the standard deviation of the difference (Abner - Abijah) in the amount of time it takes for the two brothers to paint a medium sized room?

A

$0.18\text{ hours}$

B

$0.44\text{ hours}$

C

$0.54\text{ hours}$

D

$0.77\text{ hours}$

E

$1.08\text{ hours}$

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