In a 100 m race, A can beat B by 25 m and B can beat C by 4 m. In the same race, A can beat C by:________?

In a 100 m race, A can beat B by 25 m and B can beat C by 4 m. In the same race, A can beat C by:________?

A. 21 m
B. 26 m
C. 28 m
D. 29 m