Sweating can dehydrate us if good amount of water is not consumed.
In their competition for power, nations raced to colonize as many places as possible, since colonization meant an increase in raw materials, as well as usually an increase in labor force through exploited natives.
I have done some research and went off of what I knew, but I am going to say the answer is B. Its the only one that makes the most sense.
You are very wrong, I think the answer is c