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.
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I'm going to say B because the other answers just don't seem to make sense.
A.) Mononucleosis
Mono s<span>preads by saliva.</span>
The rise or fall in a price is an example of Inflation risk.