Answer:
I would say A.
Step-by-step explanation:
Let's look at the other options:
B) A president can host a game of poker with friends in the White House. It's not a crime, so long as the president doesn't expose classified information.
C) A president's failure to report a gift would certainly be looked down upon, but again, it's not a crime.
D) A president has the freedom of speech, just like everyone else. He can support/protest whatever he wants.
Thus, A is the only logical answer.