Final answer:
The correct disposal method for controlled substances is to send them through a certified reverse distribution company to avoid environmental contamination and public health risks.
Step-by-step explanation:
The correct way to dispose of controlled substances is C) Sent through a certified reverse distribution company. Disposal methods such as pouring down the drain can lead to environmental pollution, as many substances are not metabolized completely by the body and can enter the aquatic environment through excretion and improper disposal. Alternative disposal methods, like adding substances to cat litter, are not recommended for controlled substances due to environmental and safety concerns.
Proper disposal through certified means ensures that pharmaceuticals do not contribute to environmental contamination or pose a risk to public health. Regulatory agencies often provide guidelines and certified programs to safely dispose of unused or expired medications, avoiding potential pollution in soil and water bodies. Therefore, it is critical to follow proper disposal procedures for controlled substances to prevent health hazards and environmental damage.