Julio has just realized that his pills were laced with something. What does this MOST likely mean?

A. A more addictive drug was added to his labeled drug ingredient.
B. Julio is in rehab and is gradually reducing his drug dosage.
C. A doctor has prescribed a drug to Julio that interacts with other drugs.
D. Julio will feel better after taking this safer version of his pill.

A. A more addictive drug was added to his labeled drug ingredient.