What can you conclude if you know m ∠ P + m ∠ Q = m ∠ R + m ∠ Q?


A. m ∠ P = m ∠ Q
B. m ∠ P = m ∠ R
C. m ∠ Q = m ∠ R
D. ∠ P and ∠ R are supplementary.