Answer
$B$ is closer to $C$ than $A$ is.
Work Step by Step
We find the distance from $A$ to $C$ using the distance formula:
$d(A,\ C) = \sqrt{(4-(-1))^{2}+(4-(-3))^{2}} = \sqrt{(4+1)^{2}+(4+3)^{2}} = \sqrt{25+49}=\sqrt{74}$ and
Next we find the distance from $B$ to $C$:
$d(B,\ C)=\sqrt{(5-(-1))^{2}+(3-(-3))^{2}}=\sqrt{(5+1)^{2}+(3+3)^{2}}=\sqrt{36+36}=\sqrt{72}$
We see that $B$ is closer to $C$ than $A$ is.
