Where Do Cells Obtain the Energy Needed for Their Vital

Where do cells obtain the energy needed for their vital functions?

A) Energy depends on the number of rings in their structure.
B) Energy comes from the type of sugar molecule bound to the structure.
C) Energy comes from breaking high energy bonds in a compound.
D) Energy comes from the number of enzymes that are present in the cell.
E) Energy comes from the type of nitrogenous base in the structure.