A.) Their
Their sister is happy to babysit, so you mustn't worry about it.
Their is the 3rd person plural adjective. It is used to describe something or someone that belongs to them.
They're is a contraction of "they are" and it is most often followed by a present participle or a verb that ends with -ing.
Answer:
its 100% d because it makes more sense
Answer:
Yes, she is a pediatric neurosurgeon.
Explanation:
THIRD option is correct I think.Hope it helps.
