So I ended up getting the question right but only due to process of elimination.
PC(--some--)MB (I just reversed MB(---) PC)
PC-->P-->I
Inferences
1.PC-->I
2.MBC(--some--)P
3.MBC(---some--) I
A. Inference 3
B. Inference 3
C. Contrapositive of inference 1
D. Inference 2
E. Correct answer due to elimination (But I don't understand the answer entirely)
Thanks!
I'm in! I am on on East Coast time but I can adjust accordingly!