Question 6 of 10 Jon is abusing a drug to gain muscle mass. Which drug is Jon most likely abusing? A. Tobacco B. Cocaine C. Heroin D. Performance -enhancing drugs

## Step 1<br />The question is asking us to identify the type of drug that Jon is most likely abusing, given that he is using it to gain muscle mass. <br /><br />## Step 2<br />We need to consider the effects of each of the given options on the human body. <br /><br />## Step 3<br />Tobacco is primarily known for its addictive properties and its impact on the respiratory system, not for muscle mass gain. <br /><br />## Step 4<br />Cocaine is a powerful stimulant that affects the central nervous system, but it does not contribute to muscle mass gain. <br /><br />## Step 5<br />Heroin is an opioid that is primarily used for pain relief and does not contribute to muscle mass gain. <br /><br />## Step 6<br />Performance-enhancing drugs, on the other hand, are known for their ability to increase muscle mass and improve athletic performance.