What Is the Difference Between a Veto and a Pocket-Veto

What is the difference between a veto and a pocket-veto?

A) A veto refers to the constitutional power of the president to send a bill back to Congress with reasons for rejecting it; a pocket veto occurs when Congress adjourns within 10 days of submitting a bill and the president simply lets the bill die by neither signing it nor sending it back.
B) A pocket veto refers to the constitutional power of the president to send a bill back to Congress with reasons for rejecting it; a veto occurs when Congress adjourns within 10 days of submitting a bill and the president simply lets the bill die by neither signing it nor sending it back.
C) A veto can be overturned by a two-thirds majority vote of both houses of Congress; a pocket veto requires a two-thirds vote of the Senate only.
D) A veto refers to the constitutional power of the president to send a bill back to Congress with reasons for rejecting it; the pocket veto has been declared unconstitutional by the Supreme Court.
E) The veto has rarely been exercised by modern presidents; the pocket veto has been exercised by modern presidents frequently.