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

easy

Which of the following pieces of information is sufficient to prove that $\angle J$ and $\angle L$ are congruent?

I. $\angle J$ and $\angle L$ are complementary angles.
II. $\angle J$ and $\angle L$ are vertical angles.

A

I is sufficient, but II is not.

B

II is sufficient, but I is not.

C

I is sufficient, and II is sufficient.

D

Neither I nor II is sufficient.