Alice has a total of 12 dimes and nickels.she has 2 more nickels than dimes.which equation represents the given problem situation?
 A.c+2c=12,where c is the number of nickels 
 B.c+(c+2)=12,where c is the numbers of nickels 
 C.c+(c+2)=12,where c is the number of dimes
 D.c+2c=12,where c is the number of dimes