Read the following context and choose the best option to answer the question.
Context: He was on a new medication that suppresses the immune system , and that 's where the pneumonia came from . This contributed to Mac 's death . He was so young and talented . It is so sad to see someone lose their life at such a young age .
Question: Why may have Mac ultimately passed away ?
Options: 
A. His immune system was poor .
B. He got murdered .
C. He got hit by a car .
D. He got attacked .


A