A.Because their value has been raised since they were made.B.Because they contain more silver than they used to.C.Because they contain less silver than they should do.D.Because the metal wears down in use.
A.Because their value has been raised since they were made.
B.Because they contain more silver than they used to.
C.Because they contain less silver than they should do.
D.Because the metal wears down in use.