what is the relationship between $angle m$ and $angle n$?\nchoose 1 answer:\na vertical angles\nb…

Brief Explanations:

Supplementary angles sum to $180^\circ$. $\angle m$ and $\angle n$ form a linear pair, meaning they share a side and their non-shared sides form a straight line, so their measures add up to $180^\circ$. Vertical angles are opposite each other, and complementary angles sum to $90^\circ$, which does not apply here.

Answer:

C. Supplementary angles