【单选题】I saw a television advertisement recently for a new product called an air sanitizer. A woman stood in her kitchen, spraying the empty space in front of her as though using Mace against an imaginary as...
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.