I don’t know how vague you need it so i’ll give you options to choose from hahah:
some girl’s mom bought her toothpaste at the grocery store
her mom bought her toothpaste at the grocery store.
a parent bought their child toothpaste at the grocery store.
someone’s parent bought them toothpaste at the grocery store
their mom bought them toothpaste at the grocery store.
if you need something different, i’ll be more than happy to come up with more but i hope this helped:)
B, because it has multiple subjects and verbs, and more than 1 clause.
:)-Kibeye
I believe The answer is A