Which switch would STP choose to become the root bridge in the selection process?

Which switch would STP choose to become the root bridge in the selection process?

A.
32768: 11-22-33-44-55-66

B.
32768: 22-33-44-55-66-77

C.
32769: 11-22-33-44-55-65

D.
32769: 22-33-44-55-66-78