(A) Vice President, President Pro Tem of Senate, Speaker of the House, Secretary of State
(B) ** Vice President, Speaker of the House, President Pro Tem of Senate, Secretary of State
(C) President Pro Tem of Senate, Vice President, Secretary of State, Speaker of the House
(D) Vice President, Speaker of the House, Secretary of State, Commissioner
EXPLANATIONS BELOW
Concept note-1: -Order of Presidential Succession Vice President. Speaker of the House. President Pro Tempore of the Senate. Secretary of State.