Shadow moves on screen when
(i) The source moves parallel to the screen.
(ii) The object moves parallel to the screen.
(iii) The source moves away from the screen.
(iv) Colour of the source of light changes.
(A) (i) & (ii)
(B) (ii) & (iii)
(C) (iii) & (iv)
(D) (i), (ii) & (iii).