Curtis attends a large university and knows very few people in his classes. In his sociology class, however, he was required to meet weekly with a group of four other people to work on a term project. After the term was over, they kept meeting weekly at the pub to discuss classes and participate in university events. What type of social group do Curtis and the others make?
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a primary group◦
a secondary group◦
an interest group◦
an out-group