"Improved relationship stability and better ability to handle stress or depression" is the one among the following choices given in the question that can be used to motivate <span>him to make the effort to quit. The correct option among all the options that are given in the question is the second option or option "B". I hope that this is the answer that has helped you.</span>
Using amphetamines to counteract the effects of depressants
C. Take a look at the pic below for the reasoning
The study enables scientists to understand the importance of the roles that genes and environment play in intelligence.
<h3>What is inteligience study?</h3>
The term intelligience study has to do with the asessment of individuals to effectively complete a given task in short period of time.
Twins share the same environment hence, scientists can be able to decode the importance of the roles that genes and environment play in intelligence.
Learn more about intelligence:brainly.com/question/9944825
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