One Troy Ounce Is 20 Pennyweights, One Pennyweight Is 24 $1000 g$

Multiple Choice

One troy ounce is 20 pennyweights, one pennyweight is 24 grains, and one grain is approximately 65 milligrams.How much is 1000 troy ounces, in SI units?

A) $1000 g$
B) $1 \mathrm{~kg}$
C) $31.2 \mathrm{~kg}$
D) $31.2 \mathrm{~g}$
E) None of the above