Due to the mechanical teacher's issue, what did Margie find difficult?

Correct answer: Learning Geography

Margie found Geography difficult because the Geography sector of her mechanical teacher had been set too fast. Her homework and test results became poor, so the County Inspector examined the machine and adjusted its speed. The problem was not that Margie lacked ability; the machine was presenting the lessons at a level beyond her current pace of learning. After the repair, her performance improved, although she briefly wished that the inspector would leave the machine unrepaired. Thus option A is correct. The attic and the old book relate to the discovery of the story, while Tommy is her companion, so options B, C, and D do not identify the subject affected by the machine’s fault.