Answer:
B
Step-by-step explanation:
A is not considered worthy of impeachment as only the President can do this and it does not matter how many times he vetoes bills. C is a common thing for a President to do (after all, there are so many campaign promises) but it does not mean that will hurt the President. Thus D is incorrect, leaving only B, which is the correct answer. Think about how the Senate acts as a jury in the case of the crime the President committed, and he may or may not be found guilty.