A disadvantage of circuit training is A. It is not a good way to organize training.
B. It takes time to rearrange and set up equipment.
C. It is not safe to do so many exercises one after another
D. All apply

circuit training can be dangerous cause accidents happen a lot while doing it, and it does take time to arrange the equipment cause most of it is heavy weights. So i highly doubt it is A. so cross that off so its either B or C or it could be all that apply you would have to do some research on circuit training and see if its a bad way to exercise.

Explanation: Hope i helps have a wonderful day {>^o^<}