问题详情

What is the main idea of this passage？
A．We don"t need to worry too much about bacteria everywhere in our life.
B．Antibacterial products for the home are found to be effective.
C．The TV advertisement the writer mentioned is a total failure.
D．The existent bacteria pose a threat only to the very young and very old.请帮忙给出正确答案和分析，谢谢！