8. A point moves along the curve y = x +1 so that the x-coordinate is increasing at a constant rate of 3/2 units per second. The rate, in units per second, at which the distance from the origin is changing when the point has
coordinates (1, 2) is equal to
A) 7sqrt(5)/10
B)3sqrt(5)/2
C)3sqrt(5)
D)15/2
E)sqrt(5)