What is part of an effective introduction? A. a piece of evidence to support the claim
B. an interesting quote or fact about the topic
C. a reason the reader should agree with the writer
D. an explanation of how the reader can help

Rick is a toddler with an easy temperament and active nature. people are often seen stopping to talk to him in supermarkets and parks where his mother takes him in the evenings because he smiles willingly at other children and adults. this aspect of rick’s behavior most likely reflects a(n) active genotype–environment interaction suppressive genotype-environment interaction passive genotype–environment interaction evocative genotype–environment interaction