4. Nerve cells, called neurons, in our brain and nervous system communicate with each other using a process called neurotransmission. Which of the following is/are true?
O a. Drugs affect the brain by enhancing and assisting the neurotransmission process
O b. Drugs affect the brain by interfering with the neurotransmission process
O c. Alcohol has little effect on the way neurons transmit messages
O d. Drugs have insignificant effect on the way neurons receive messages