In a 30-60-90 triangle, the hypotenuse has length 14. Which value is closest to the length of the longer leg?

In a $30$-$60$-$90$ triangle, the side lengths are in the ratio $1:\sqrt3:2$, with the hypotenuse the longest. The hypotenuse is $14$, so the shorter leg is $\frac{14}{2}=7$ and the longer leg is $7\sqrt3\approx7(1.732)\approx12.1$, choice B. Check with the Pythagorean theorem: $7^2+(7\sqrt3)^2=49+147=196=14^2$. Choice A ($7$) is the shorter leg. Choice C ($9.9$) is $7\sqrt2$, from a $45$-$45$-$90$ ratio. Choice D ($14$) is the hypotenuse, which is always longer than either leg.