Adjust the frequency of her workouts to add time for rest and recovery. I think.
Answer:
It was actually "weaker immune system". Just took the test and got it right.
Explanation:
All the other answers are short term effects. If you don't sleep for a day, your movements would be slower, you would be more tired and wouldn't be able to concentrate. However, if you just miss one day of sleep, your immune system ain't gonna suffer.
Answer:
unless its a trick question id say dribbling
