Answer:
B
Step-by-step explanation:
The process for overriding a veto can be found in Article I Section 7 of the Constitution
"...or being disapproved by him, shall be repassed by two thirds of the Senate and House of Representatives..."
This basically means that if the President were to veto a bill, both the House and the Senate will each need two thirds of its members to override the veto and pass the bill.