I believe it’s D, please correct me if I’m wrong
There are several factors including but not limited to proper diet including healthy food choices and the right amount of calories to maintain loose or gain weight. eight glasses of water per day. plenty of sleep. exercise three times per week. healthy attitude and emotional stability
Lifting things that are too heavy... pushing too hard. Flexing out, and I think doing this specific workout for your stomach too much.
- If it's a pill or something, someones body could react badly to it
- Age definitely effects it