Answer:
A) Fear of germs
Explanation:
As the monster, germs have terrorized humanity for years. The "decaying body" and it's "ozzing sores" resemble something that is very ill and that looks extremely contagious. There have been several epidemics that have killed thousands of humans. Some of them are provoked by germs that, as we know, can't be seen with a naked eye, therefore people need to represent those germs with it's imagination.
