In the diagram, BD is a diameter and
21= 22. Explain why AB and CD have the same length.

Options:
A.) 1 and <2 are congruent vertical angles, therefore AB and CD have the same length.

B.)1 and <2 are congruent inscribed angles, therefore AB and CD have the same length.

C.)1 and <2 are congruent central angles, therefore AB and CD have the same length.

D.)1 and <2 are congruent alternate interior angles, therefore AB and CD have the same length.