Answer:
D. All of the above but read below:
Step-by-step explanation:
It is possible that all of the above substances could be used as contaminants in heroin, as drug dealers may use various substances in an attempt to dilute or otherwise alter the drug in order to increase their profits.
However, it is important to note that the use of any of these substances can significantly increase the risks associated with using heroin, as they can be toxic and potentially lethal. It is always best to avoid using illegal drugs, as they can be dangerous and unpredictable.