______ is the real inventor of the barbed wire.

A．fencing attracted cattle
B．that cattle shield away from the barbed wire
C．making cattle grow more quickly
D．that the garden could be used as a parking lot

A．To see how certain chemicals produce different flavors.
B．To determine if a person can distinguish salty and sweet solutions.
C．To map the location of taste buds.
D．To count the number of taste buds.