The man is either posing for a photo or riding a donkey.
This justifies what answer for what question? Q & A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Given the sentence "A man in a hat is posing for a photo with a white donkey pulling a wagon." is it true that "A man in a hat is riding a donkey to mexico."?
no