C. personal study________________
I'm not 100% sure but I'm pretty sure it's height, good luck with it!
The best thing that Mary should do in helping Sue is to get her safely home.
<h3>What is the best thing to do?</h3>
This would be taking Sue home and making sure that she is with her parents so she would not do something that she would regret.
Hence, we can see that because Sue is dru-nk/tipsy, she is about to make a bad decision and go home with an older boy and as a good friend, it is Mary's duty to take Sue home or call her parents.
Read more about dru--nkenness here:
brainly.com/question/24274348
#SPJ1
I think the answer is C. Ibuprofen.