The wealth gap is a major criticism of A. capitalism
B. communism
C. socialism
D. all of the above

A. Captialism

Explanation: Under communsim and socialism in theory everyone has around the same amount of wealth. In captialism, there is a range of wealth from very rich to very poor. This has been a major critism of captialism.

the of atp are the key to its ability to store and supply energy;

phosphate

the phosphate groups of atp are the key to its ability to store and supply energy. atp releases energy when it breaks bonds between its phosphate groups.

the answer is a. harriet tubman was a nurse on the battlefield.