Select the correct answer.
Heather's work to find the distance between two points, [tex]\( A(-3, -4) \)[/tex] and [tex]\( S(5, 7) \)[/tex], is shown:
[tex]\[
\begin{aligned}
RS & = \sqrt{((-4) - (-3))^2 + (7 - 5)^2} \\
& = \sqrt{(-1)^2 + (2)^2} \\
& = \sqrt{1 + 4} \\
& = \sqrt{5}
\end{aligned}
\][/tex]
What error, if any, did Heather make?
A. She substituted incorrectly into the distance formula.
B. She subtracted the coordinates instead of adding them.
C. She made a sign error when simplifying inside the radical.
D. She made no errors.