Once a President vetoes a bill, what must happen to override his veto?

Both houses must pass the bill by a simple majority.
Both houses must vote in favor of the bill by a two-thirds, or super-majority vote.
Only one house needs to pass the bill by a two-thirds majority vote.
None of the these. Congress cannot override a presidential veto.

Question

Once a President vetoes a bill, what must happen to override his veto?

Both houses must pass the bill by a simple majority.
Both houses must vote in favor of the bill by a two-thirds, or super-majority vote.
Only one house needs to pass the bill by a two-thirds majority vote.
None of the these. Congress cannot override a presidential veto.

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What do you think?
@Ultrilliam subject change