Which of the following statements is true of mdma (ecstasy)? multiple choice
a. it has both stimulant and hallucinogenic properties.
b. it depresses the central nervous system activity.
c. it is the active ingredient used in barbiturates.
d. it causes the brain to release large amounts of melatonin.

About MDMA and its properties the true sentence and correct option to answer your question is the option "a".

Explanation:

MDMA belongs to substituted amphetamines classes of drugs and it has hallucinogenic and stimulant properties. It acts primarily by increasing the neurotransmitters serotonin, dopamine and noradrenaline in parts of the brain.

there are conflicting perceptions. what cannot be denied is that despite a long history of discrimination, they finally chose to bow out in grace and handed over power to the majority. it was a painful experience for them to part with their prerogatives and some chose to leave the country. however, they did decide to bite the bullet and go through the process with minimum obstructions.

presently, whites are still a force to reckon with. they are well educated, have technical and business expertise, they understand imperatives of good governance and are responsible for keeping south africa connected with developed countries. despite a bitter history, they are useful team members of the south african team.