If r = 1.5mm, VT = 7m/s. The value of b for the raindrop assuming the drag force is given by D = bv, and the density is 1.0g/cm, is given by? A. 2×10-5N.S/m B. 3×10-5N.S/m C. 4×10-5N.S/m D. 5×10-5N.S/m