The man was detained by the police at the airport because his passport was found to be ______.

A. He was offered a better job.
B. He received a traffic ticket.
C. He always drives through a lot of traffic.

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.