Question

dogs, especially sniffer dogs, have a far better sense of smell than humans because their smell receptors are much longer than those in human noses. human noses differ from person to person, but they can affect the way a person tastes food. sniffer dogs are used by police and security personnel throughout the world to detect drugs in airports and other busy places. they are specially trained and can pick up even the lightest scents of drugs or firearms.
which sentence supports the idea that sniffer dogs are excellent drug detectors?
a. they can pick up the lightest scent of drugs or firearms
b. dogs smell receptors are smaller than humans are.
c. human noses can affect the way a person tastes food.
d. sniffer dogs detect drugs in airports and other busy places.

Explanation:

The text states that sniffer dogs are used by police and security personnel throughout the world to detect drugs in airports and other busy places. This directly shows their role as excellent drug detectors.

Answer:

D. Sniffer dogs detect drugs in airports and other busy places