Why do you think your shouldn't eat a lot for two-and- a-half hours before vigorous exercise?

Because eating high meals before workout os likely not digested and remains in our stomach while exercising. So,it may cause uncomfortable gastrointestinal symptoms like nausea, bomitting or diarrhoea.

exercising at a moderate intensity, and slowly increasing the duration.

according to e2020 te answer is c. continuity.