问题详情

We can infer from Paragraph 3 that ______.
A．healthy people should live separately from unhealthy members of the family
B．a germ-free home is not only possible, but significant
C．unless you live with the vulnerable, it is pointless to sterilize the air
D．our immune systems are too weak to fight against the food poisoning bacteria请帮忙给出正确答案和分析，谢谢！