Answer:
Upper right.
Step-by-step explanation:
It's no wonder you are a bit confused. I really can't say that I can completely answer this question. You are going to have to pick the best of a bad choice.
Attachable is used correctly in the sentence. It means that you are able to put the wheels on temporarily and take them off when they are no longer needed.
The answer is not "worn the wrong way" They must be worn correctly, or you wouldn't get to school.
The answer is not "worn for the first time." Sounds like the speaker has a pretty good idea of how they are used.
The word itself does not mean "joined to the bottom of something." That happens to be so, but the word itself doesn't mean that and the sentence is correct.
I guess the best answer is the upper right. The idea of it being temporary is not part of the answer and that's important. I think it is your best answer, but don't be surprised if it's the lower right.