문제 내용: 다음 글의 요지로 가장 적절한 것은?
선택지 1: People are more likely to help those who dress like themselves.
선택지 2: Dressing up formally increases the chance of signing the petition.
선택지 3: Making a phone call is an efficient way to socialize with other students.
선택지 4: Some college students in the early 1970s were admired for their unique fashion.