Although most psychoactive substances interact with specific substances in the brain cells, the effects of are much more complex because several different neurotransmitter systems are affected.

alcohol

Explanation:

Based on the information provided within the question it can be said that the substance that is being mentioned is alcohol since the effects of this substance are much more complex. This is because like mentioned in the question is affects several different neurotransmitter systems such as dopamine, endogenous opiates, GABA, serotonin, and glutamate acting at the NMDA receptor.

a: social security and social programs

answer; all of the answers are correct;