All of the following statements concerning drugs and supplements are true except: a. many drugs and supplements are ineffective and expensive. b. many supplements and drugs are frequently used to improve performance and appearance. c. supplements and drugs both undergo stringent government testing. d. supplements and drugs can both cause unwanted side effects.

The correct answer should be C. Supplements and drugs both undergo stringent government testing. That is because there are many supplements and drugs that are actually just casual things like vitamins or proteins or similar things that can't really bother you and have already been tested so they're not serious. Especially things like natural medicines and things like that.

I believe the answer is c. i hope this helps