In a gravity free space, a man of mass \[M\] standing at a height \[h\] above the floor, throws a ball of mass m straight down with a speed \[u\]. When the ball reaches the floor, the distance of the man above the floor will be

• A.  \[h(1+m/M)\]
• B.  \[h(2-m/M)\]
• C.  \[2h\]
• D.  a function of \[m\], \[M\], \[h\] and \[u\]