What Is One of the Most Difficult Aspects of Studying

Multiple Choice

What is one of the most difficult aspects of studying animal viruses?

A) The viruses are hard to obtain.
B) The use of animals is expensive, and unethical to many people.
C) The viruses are extremely dangerous to handle.
D) The study requires expensive facilities.
E) The use of animals to study the viruses is unethical in the eyes of many.