Answer:
if my partner crossed one of my boundaries i would have a civil conversation with them and ask why they did that.
tell them that it wasn't ok and that you wont except it.
just have a conversation about the boundaries that you guys want set for the relationship.
you could put a password on your phone and tell them to not go on your phone without your permission, have your phone on you at all times or hide it when you don't need it.
tell them what you think about the situation.
Explanation:
hope this helps!
You may not be flexible and hurt your key badly and can lead to a lot of pain
C has the strongest result if not followed correctly so i think answer is
C
hope i helped!! :)