Two trains A and B are 155 km apart on a straight line. One train starts from A at 7:00 A.M. and travels towards B at 20 km/h. Another train starts from B at 8:00 A.M. and travels towards A at a speed of 25 km/h. At what time will they meet?

A

12:00 A.M.

B

9:00 A.M.

C

11:00 A.M.

D

10:00 A.M.