B) stimulant
Caffeine is usually not dangerous when used carefully. Depressants are a group of drugs that slow down the activity in the brain and body. and coffee helps you stay awake.
It has helped keep patient information private. It has created more protection to be implemented and further measures to be taken to protect peoples privacy within the healthcare sector.
Im not sure exactly what you are looking for as an answer to this.
Recycling is your answer.