Two particles begin moving at time t=0 s. Particle A moves along the x-axis with position x(t)=t2 m, and Particle B moves along the y-axis with position y(t)=8−t2 m. What is the rate of change of the distance between the particles, in m/s, at t=2 s?
a) 42
b) 0
c) 8
d) 2