Security analysis may be conducted by:

A) only investors themselves.
B) only professional analysts.
C) investors and professional analysts.
D) None of these are correct.

Security analysis can be done by both investors and professional analysts. Investors can conduct their own analysis by reviewing financial statements, industry trends, and company news. Professional analysts, on the other hand, may have access to more data and resources and may employ more sophisticated analysis techniques. Ultimately, both groups play a critical role in informing investment decisions.