He can progress by Jump-roping, running(same as Jogging almost), swimming and bicycling, Aerobic's and Aerobic Dance, and At-Home exercises.
Type a b and c are the pathogens
e. decision making because a means that you have not reached a conclusion, be is more of "i only have so much" type of answer, c does not make sense, and definitely not d.
A. T-cell. This activates to fight off the virus or bacteria in your body.