The best answer it's clearly (D.), it offers logic and congruence with the caption's line of reasoning, which is to set expectations and possible outcomes without specifying, since those are random pictures, which is good in the sense of point out the importance of clearly communicating a goal and inducing people to have an open mind towards the future event, avoiding possible remorse caused by unrealistic expectations by someone.
Allegory? An allegory is a<span> story, poem, or picture that can be interpreted to reveal a hidden meaning, typically a moral or political one.</span>
