During the Period of the Han Dynasty,the Population of China

During the period of the Han dynasty,the population of China

A) doubled in size, but continued to be concentrated along the banks of the Yellow River.
B) remained relatively constant and gradually expanded to different regions of the growing empire.
C) decreased in size because of famine, warfare, and disease.
D) tripled in size and was often forced to migrate to different places in an expanding empire.