question: classroom:self-study
choices.label: A B C D
choices.text: mall:cleaning school:propaganda road:drive post office:remittance
explanation: the "classroom" is the place where students "self-study", and the activities do not require external force. "mall" is the place where goods are sold, and "mall" is not the place for "cleaning". "School" is the place for teaching and educating people, and "school" is not the place for "propaganda". the "road" is where the driver "drives" and does not require external force. the "post office" is the place where the "remittance" takes place, but it requires external help.
relation: classroom self-study R3.10
relation: road drive R3.10
relation: post office remittance R3.10