ACCorDing to thE pAssAgE, thE BEst solution on thE proBlEm sEEms to BE______.
A．not to ChAngE shiFts From onE wEEk to thE nExt
B．to mAkE pErioDs on EACh shiFt longEr
C．to Employ pEoplE who will AlwAys work At night
D．to FinD wAys oF sElECting pEoplE who ADApt quiCkly