In an Ordinary Merger,what Approvals Are Needed

In an ordinary merger,what approvals are needed?

A) Recommendation by both boards of directors and votes of the shareholders of each corporation.
B) Votes by both boards of directors,but shareholders need not approve.
C) Vote by the board of directors of the surviving corporation,and for the corporation that does not survive,recommendation by the board of directors and vote by the shareholders.
D) For both corporations,a vote by the shareholders,but no action by the board of directors.
E) No approvals needed by the surviving corporation,and for the corporation that does not survive,recommendation by the board of directors and vote by the shareholders.