If a Bill Fails Because of a Pocket Veto, It

If a bill fails because of a pocket veto, it means which of the following?

A) While the House passed it, the Senate metaphorically stuck it in a pocket, forgot about it, and failed to send it to the President.
B) While the Senate passed it, the House metaphorically stuck it in a pocket, forgot about it, and failed to send it to the President.
C) Congress adjourned before 10 days elapsed after sending a bill to the President, and the President metaphorically stuck it in a pocket and forgot about it.
D) Congress failed to give the President the constitutionally mandated 120 days to sign or veto the bill.