The line called A is one step over 75º wich means the answer can only be A = 76º.
You might also think the answer is D (84º), but the line called C, would need to be on the left side of B, and not on the right.
Answer:
![\boxed {\bf~The~correct~option~is~A~(76).}](https://img.qammunity.org/2019/formulas/mathematics/middle-school/pj1tyob07tx3yu2umtfdtmktqugosclavu.png)
Hope it helped,
Happy homework/ study/ exam!