Yes it is an amazing poem and piece of writing work actually
The correct answer should be C. Brittany
That is because her being late is something that can easily change and wouldn't really affect her life that much. She is rational about her being late. Hassan is close to becoming an alcoholic and would be hysterical without it meaning that his decision to drink is not rational.
The words chosen to create meaningful dependent clauses are the following ones:
a) Although Marissa likes to bake, she doesn't like to cook (this conjunction is used to make the main statement in a sentence seem surprising)
b) I have an idea that I think you will like (the complementizer introduces the noun-complement clause attached to the noun "idea")
c) If we drive slowly, we will find it (the conjunction used to introduce a conditional clause)
d) French, which we also had last year, is my hardest subject (a relative pronoun, which in this case, introduces a non-essential relative clause)
its: d) literary criticism. I just took the test and got 100%