In the sentence "Consumers bother less with pocket change and are able to use plastic even at traditionally cash-only vendors. "(paragraph 3 ), the word "plastic" has the meaning of ______.

A．they have no time
B．they are from the nucleus family
C．they have never met them before
D．they don' t like them

A．Probably because American have got used to ATM bank cards or stored -value cards.
B．Probably because American is too large.
C．Probably because American like signature.
D．Probably because American like paper vouchers.