I need Biology answers, someone help!?

okay. I had a midterm last week in biology and i missed one about energy.. it says: ATP: A. contains five phosphate groups. B.Is essential for a cell to perform all the tasks necessary for life. C.is found only in bacteria. D.is produced by photosynthesis. [i circled D. but i got it wrong. im thinking its B and i need help figuring out why thats the right answer because i have to do corrections! please help?!