Choose the correct answer

It’s only for an hour but class members do lots in that time, beginning with jogging
to warm (5) ________. After that there’s some weight lifting and jumping, and then you do some
more relaxing exercises at the end.
The clothes you should wear are pretty much the same as you’d wear for any other
exercise class – so a T-shirt and shorts or a tracksuit is fine. Oh, and wearing trainers is a must,

5. A. off B. up C. of D. from