The trainer assigns a lab and then wanders around the room observing the students. The trainer makes comments or helps students some of the time. Which of the following would be the BEST feedback for a student who has finished the lab early without difficulties?
A. Ask the student to describe to the class how the lab ties in with the topic
B. Ignore the student; other students need more help
C. Watch the student in future labs to ensure no cheating is occurring
D. Quietly comment on how the student has done a good job
