单项选择题

M: I wonder if Suzy will be here by 5 o’clock.
W: Her husband said she left home at 4:30. She should be here at 5:10, and 5:15 at the latest.

What time did Suzy leave home()

A. 5:10.
C. 4:30.
B. 5:00.
D. 5:15.