Dynamite is being used to blast through rock to build a road. After one explosion, the masses and kinetic energies of several fragments of rock thrown up into the air are:

(a) 8 kg, 400 J
(b) 2 kg, 1600 J
(c) 4 kg, 1600 J
(d) 16 kg, 100 J
(e) 1 kg, 1600 J

Rank the fragments in order of the magnitude of their momentum, smallest to largest.