I don't believe it is because they are two different measurements if it was mm kg then yes
I’m assuming it would be body structure, considering you can always become more intelligent and your personality changes overtime and there are ways to control your weight.
There are 12 pairs of ribs. Each rib is a curved, flattened bone that contributes to the wall of the thorax. The ribs articulate posteriorly with the T1-T12 thoracic vertebrae, and mist attach anteriorly via their costal cartilages to the sternum.
Soot is mainly composed of carbon. The black particles is ALL carbon because of the incomplete combustion of the hydrocarbons. Therefore, your answer is B, black carbon.