Two particles A and B locat at (0,0) and (4,4) respectively start moving simu lataneou ly with velocities `v_(A)=-4hati` and `V_(B)=-4hatj`:
A. the shortest distance between them is `4sqrt(2)m`
B. the shortest distance between them first decreases and then increases
C. the distance between them increases from the beginning
D. the magnitude of relative velocity of A w.r.t. B is 4m/s