Steven had been "hooked" for a while before he decided to "go clean." Within 6 to 12 hours, he started to experience excessive yawning, nausea and vomiting, chills, muscle aches, diarrhea, and insomnia. His behavior disrupted his work and social relationships. These symptoms persist for three days. After a week, he felt better. Steven is probably withdrawing from Group of answer choices a) alcohol. b) cocaine. c) heroin. d) LSD.

This is because the above symptoms are due to withdrawal from drugs, and not alcohol - although one would feel nauseated and experience vomiting when drinking the rest off the symptoms resemble heroine.

It is not cocaine, because cocaine tends to have more psychological symptoms like depression and suicidal thoughts.

Nor is it LSD, for LSD is known for not having many actual physical side effects, but people do experience bad trips and flashbacks quiet frequently.