In this scenario, where a cell has DNA damage and has twice the amount of DNA, the cell would likely trigger apoptosis at the G2 checkpoint. The G2 checkpoint is responsible for ensuring that DNA replication has been completed correctly and that the cell is ready to enter mitosis (M phase). If there is any DNA damage or abnormalities, the cell will typically undergo apoptosis to prevent the propagation of damaged DNA.
So, the correct response is:
G2 Checkpoint