Which expression correctly represents the perimeter of a rectangle that is 12 centimeters long and 7 centimeters wide?
A(12 cm + 7 cm)
B2(12 cm) + 7 cm
C12 cm + 2(7 cm)
D2(12 cm) + 2(7 cm)
A(12 cm + 7 cm)
B2(12 cm) + 7 cm
C12 cm + 2(7 cm)
D2(12 cm) + 2(7 cm)