Read the passage and answer the question.
PASSAGE (P22): When the rain started, Kofi noticed that the window in their classroom would not close properly. Water began to drip onto the back desk. Without waiting for the teacher, he moved the desk forward and placed an old cardboard box under the dripping corner. After class, the teacher thanked him for acting quickly.
QUESTION: What does the teacher’s thanks imply?
Which option is the best inference from the passage?
Select the ONE best answer from the options panel.