Which Statement About "Date Rape" Drugs Is False

Which statement about "date rape" drugs is false?

A) They cause amnesia for the rape, which limits the ability to prosecute the rapist.
B) The government recently passed legislation to increase the penalties for sale or possession of these drugs.
C) The Drink Safe Coaster is a reliable way to test drinks for the presence of Rohypnol and GHB.
D) The pharmaceutical company has reformulated Rohypnol so that it turns blue when dissolved in alcohol to discourage its use as a "rape drug."