Nada believes that the drug she just took will make her more lively and outgoing at the party she is attending, but it is actually slowing her system down, and may impair her thinking and her behavior. Which of the following drugs has Nada ingested?
A. Nicotine
B. Caffeine
C. Alcohol
D. Heroin

Explanation:

Alcohol is a drink that contain ethanol. Its consumption plays important role in various cultures. It is most used addictive and psychoactive substance used in US.  

Alcohol affects our cognitive ability and impairs cognitive behaviours.  A person under its influence may experience blackouts, unable to think clearly.

It affects our muscle coordination , reflexes and our ability to properly recognise and react to the danger.  It also  affects our visuospatial abilities.  

As it is a depressant, it slows down the brain's ability  to communicates with the nerves.

Nada also took alcoholic drink that made her nervous system slow.