I’m pretty sure it’s B a predicate adjective
A, it is informal. She is writing to somebody she personally knows, like her cousin, and doesn't mind if she gets a bad impression from it. Her cousin knows her well enough to not judge her.
Explanation:
it means to be careful when chossing in order to choose to right descision
3.)While teens on social media may feel like they are spending time with friends, it turns out that social media actually disrupts relationships.
Basically pretend that you are your pet and describe what experiences your pet goes through on a day-to-day basis.
