In parallelogram M N P R, diagonals M P and R N intersect at Q. M N = 3 x - 4, N P = 2 y + 5, R P = 20, and M R = 17.9. Find m \angle R M N.
Choices:
A:33
B:38
C:71
D:109
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: In parallelogram M N P R, diagonals M P and R N intersect at Q. M N = 3 x - 4, N P = 2 y + 5, R P = 20, and M R = 17.9. Find m \angle R M N.
Choices:
A:33
B:38
C:71
D:109
Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
Question: In parallelogram M N P R, diagonals M P and R N intersect at Q. M N = 3 x - 4, N P = 2 y + 5, R P = 20, and M R = 17.9. Find m \angle R M N.
Choices:
A:33
B:38
C:71
D:109