A is wrong because it’s not starting with an assumption but it’s starting with an opinion.
B is wrong because it’s an opinion as well
C is wrong because it’s just a quote
D is the right answer because it started out with an assumption and ended with an argument starter
hope this helped !
Answer:
The last one is correctly punctuated.
Hope it helps you!!
im going to read it then get back to you
the answer is a simple complement