Answer:
You've asked an incomplete/unclear question. However, the context shows you want to know more about the Veto power of the President.
Step-by-step explanation:
Remember, the veto power allows the President to either accept or reject/ignore a bill (proposal).
Since Congress prefers proposal A over B (which the President likes), then either or both or neither may become law.
The four possible outcomes, and the rankings of the two sides is attached as an image below.