Susie's mom bought her SOMETHING at the grocery store.
Vague nouns are unspecific things that don't tell you exactly what something is!
More examples of vague nouns: something, things, stuff, etc.
Answer:
I would go with A but I'm not sure
If you can, try searching how it began and why it did.
Try looking up words that can help describe what you’re mentioning.
Find reasons to why the Olympics is so important.
Maybe write how it can inspire people also.