I am going to say C adjective clause because the words in all caps is a dependent clause. Adjective clauses are always going to be dependent and sometimes starts with who, whom, which, or that
hope this helps
I would personally go with B
Answer: it shows love is hard
Explanation :
Because when them two people fall in love there go be aguringments , fights , lies and breakups and makeup so loving is hard to let you know .