Which, If Any, of the Following Statements Is False

Which, if any, of the following statements is false?

A) p53 acts as a brake on cell growth but stimulates apoptotic pathways.
B) apoptosis occurs only after a death signal is received by one cell from another cell.
C) the death signal starts a pathway that culminates in the activation of a class of proteolytic enzymes called caspases.
D) caspases attack cellular proteins and release an endonuclease that cleaves the cellular NA into small fragments.