Well I do say from my studies and experience, that a warm up should be less intense than the exercise, because you don't wan't to workout to hard before getting to the main exercise, that's like having a huge appetizer then then main course meal. So my final answer would be C. Hope this helps
I'm going to say B because the other answers just don't seem to make sense.
Alcohol, For sure is one of them, Pesticides, Household products, Etcetera..
Not sure but I think it’s gaining strength
