Masking agents are among the broad classes of performance-enhancing substances.

• A. False
• B. True
• C. Not specified
• D. Not mentioned

Answer: (B)

Masking agents are used to conceal the use of banned performance-enhancing drugs or to interfere with drug testing. Because their purpose is to enable athletes to cheat by hiding the presence of other substances that could boost performance, they’re treated as part of the broad categories related to performance enhancement. Anti-doping rules include masking agents (such as certain diuretics that dilute urine) specifically because they undermine the integrity of testing and give an unfair edge. This makes the statement true: masking agents are indeed among the broad classes of substances connected to performance enhancement. The other options don’t fit because standard classifications recognize masking agents as a real category within doping-related substances.