Despite the Swiss case being considered a positive example of drug law reform, fundamental contradictions remain. Identify them among the following options:
a. Introducing opioid agonist/substitution treatment contradicts with a drug-free society;
b. Providing harm reduction services impedes challenging the prohibition paradigm.
c. Current HIV prevention efforts do not affect the Hepatitis C epidemic.
d. Some illicit drugs are not very harmful but are demonised whereas some licit drugs are more dangerous but recommended or prescribed.
e. Since harm reduction focuses purely on medical aspects, this comes at the expense of improving social aspects of drug use