Solve the triangle. 
A. A = 109.5°, B = 38.9°, C = 31.6°
B. A = 38.9°, B = 109.5°, C = 31.6°
C. A = 38.9°, B = 31.6°, C = 109.5°
D. A = 109.5°, B = 31.6°, C = 38.9°
Answer: A
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