Answer:
The answer is A. A peer group has a strong influence on a person's opinions because group members have developed a special trust.
Step-by-step explanation:
According to development theories in psychology, peer members are a part of what is called "secondary socialization". The child's family is the primary socialization group, but, such as the role the family plays in socialization, the child also looks for references in a peer group when growing up.
Group members develop a special trust in each other and search for identitary references within each other, that is why a group has a strong influence on a person's opinions.