Combine Express Your Answer in Terms of the Smaller Unit $12 \mathrm{~kg}+49.9 \mathrm{~g}$

Multiple Choice

Combine. Express your answer in terms of the smaller unit.
- $12 \mathrm{~kg}+49.9 \mathrm{~g}$

A) $1249.9 \mathrm{~kg}$
B) $12,049.9 \mathrm{~g}$
C) $120,049.9 \mathrm{~g}$
D) $1249.9 \mathrm{~g}$