The width of a rectangle measures (3.8b-1.5) centimeters, and it's length measures (4.3b-7.2) centimeters. Which expression represents the perimeter, in centimeters, of the rectangle

A.) -17.4+16.2b
B.) -2.9+2.3b
C.) 4.6-5.8
D.) 8.1b-8.7