For each statement there are four different sentences given below it. Pick out the one that most appropriately conveys the meaning of the statement.
Crossing the street, a bus almost crushed us to death.

A. Crossing the street, a bus almost crushed us to death.

B. A bus almost crushed us, crossing the street.

C. As we crossed the street, a bus almost crushed us.

D. A bus, crossing the street, almost crushed us.