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Math·Geometry and Trigonometry·Lines, angles, and triangles

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In triangle $FGH$, the measure of angle $F$ is $63^{\circ }$. Which additional piece of information is sufficient to prove that triangle $FGH$ is a right triangle?

A

The length of $\overline{FH}$ is $63$.

B

The length of $\overline{GH}$ is $126$.

C

The measure of angle $H$ is $27^{\circ }$.

D

The sum of the measures of angles $F$, $G$, and $H$ is $180^{\circ }$.