Which of the following statements are true about attention-deficit/hyperactivity disorder?
a. the use of stimulants in small doses focus attention and reduces hyperactivity.
b. for children with adhd, excessive fidgeting them focus on the task at hand.
c. drugs prescribed for adhd have the same effect on people who do not have adhd as it does on people with adhd.
d. stimulant drugs taken for adhd reduce symptoms by increasing the release of dopamine and serotonin.

A. The use of stimulants in small doses helps focus attention and reduces hyperactivity.

Explanation:

Methylphenidate is a common drug stimulant that is given to the children above five-year-old for ADHD. This medicine comes under a category called stimulant which increases the activity of the brain particularly that area which suppresses the level activity related to attention and concentration. but it has some side effects of stimulants.

answer: musical connotation

leonard b. meyer (1918-2007) was an american composer, author and philosopher. his work emotion and meaning in music is perhaps the first major treatise on music. it is a philosophical and psychological work, greatly influenced by koffka (one of the major proponents of gestalt psychology). his work deals with the problem of musical meaning and musical communication.

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.