What Is the Difference (If Any)between the Structure of ATP

Multiple Choice

What is the difference (if any) between the structure of ATP and the structure of the A nucleoside triphosphate used to make RNA?

A) The sugar molecule is different.
B) The nitrogen-containing base is different.
C) The number of phosphates is three in ATP instead of one in RNA.
D) There is no difference;they are the same molecule.