Please help I will mark brainliest

Which of the following is a major cause of injury

What effect do stimulants, such as cocaine, have on the nervous system? o a. stimulants change the activity of neurotransmitters. o b. stimulants mimic hormones and influence moods. o o c. stimulant|mchange how sensory information is processed. d. stimulants decrease brain activity.

Taking a foil acid supplement during childhood can prevent illness