One free LSAT-style logical reasoning question a day. No timer. Pick an answer to check yourself, then read the explanation.
Strengthen question · #108 of 120
A school moved lunch from classrooms to the cafeteria, and afternoon focus improved. The principal credits eating away from desks.
Which one of the following, if true, most strengthens the argument?
Show explanation
A same-school comparison group that changed nothing and gained nothing points the improvement at the lunch setting. Tables and volunteers never rule anything in or out.