A will be the answer because usually marking your exercise days will become a habit because lets say you would do a running exercise but you want to do it in a certain day well if you mark it on the calendar, it'll become a habit.
I think it might be Atari or Nintendo nes. or maybe Mario or pong. honestly I am not 100% sure what they mean by "mainstream appeal"
Answer:
It would use it for energy
The answer is C.
Because if it is not Medical Science then C is the answer you are looking for
Tabasco does leave an addictive drug known as nicotine.So your answer is true