Assuming all the information above is correct, I believe the correct answer will be B).
First of all since error occurs when DNA of a cell is copied, that happens during S phase, so making B and D the more likely correct answer. Then in the cell cycle, there are checkpoints at phases to ensure one cell has successfully completed the first phase before moving on to the next phase, so tht being said, after S phase is G2, so B will be the more likely answer.