Chapter 1.5, Problem 4CP

What is the result of the following calculation to the correct number of significant figures?

( $6.266-6.261)÷522.0=$

$\begin{array}{l}\text{a)}\\ \text{9}{\text{.5785× 10}}^{\text{-6}}\\ \text{b)}\\ \text{9}\text{.579}\times {\text{10}}^{\text{-6}}\\ \text{c)}\\ \text{9}\text{.58 }\times {\text{10}}^{\text{-6}}\\ \text{d)}\\ \text{9}\text{.6}\times {\text{10}}^{\text{-6}}\\ \text{e)}\\ \text{1 }\times {\text{10}}^{\text{-5}}\end{array}$