I believe the answer is: seven calendar days
the seven calendar days is given to the schools in order to give the chance for the schools to conduct an internal investigation regarding the scandals .
If the schools are caught deliberately hiding the cases, it just opened up opportunities for the victims's family to brought up massive lawsuits.
I think it is B. demonstrating the extent to which a measurement is free from random error.
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Answer:
D. They needed more soldiers to fight German invaders.
