Answer:
D. A teacher running right into a door and falling on her face
Explanation:
Situational irony is a situation, outcome or an action that happens although that was unexpected from the known facts or premises.
It is completely unexpected for an experienced Olympic diver to make such a beginner's mistake and do the belly flop.
We could say the same for an 80- year old lady to be familiar with modern technologies, let alone use them and be a part of it.
Also, a ridiculously short man winning a high-jump competition is a rather unexpected outcome.
However, a teacher running right into a door and falling is simply a painful accident, because teachers aren't in any way less prone to accidents nor it is expected of them to never accidentally injure themselves.
C. It is the only opinionated answer that needs to be cited.
The three cases of personal pronouns are objective, possessive, and nominative.
I, we, you, he, she, it, they are nominative cases. They are used when a personal pronoun is used as the subject of a verb or as a predicate nominative.
Me, us, you, him, her, hers, its, their, and theirs are objective cases. They are used when the noun or pronoun is used as an direct or indirect object of a verb, or as the object of a preposition.
My, mine, our, ours, your, yours, his, her, hers, its, their, theirs are possessive cases. They are used to show ownership.
I believe D. Hiding in the tree fort he had built as a kid.