What is ATP's importance in the cell?

• A. ATP contains a long hydrocarbon tail and is important in storing energy.
• B. ATP can add phosphate groups, thereby releasing energy that can be used in cellular processes.
• C. ATP stores energy in carbonyl groups. When a carbonyl group is removed, energy is released to be used in cellular processes.
• D. ATP stores the potential to react with water, thereby removing a phosphate group and releasing energy for cellular processes.