In the circle, two chords A C and B D intersect. Find m \angle 2 if m \widehat B C = 30 and m \widehat A D = 20.
Choices:
A:20
B:25
C:30
D:155
Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
Question: In the circle, two chords A C and B D intersect. Find m \angle 2 if m \widehat B C = 30 and m \widehat A D = 20.
Choices:
A:20
B:25
C:30
D:155
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 the circle, two chords A C and B D intersect. Find m \angle 2 if m \widehat B C = 30 and m \widehat A D = 20.
Choices:
A:20
B:25
C:30
D:155