Which of the following options best describes how science and math advanced during the Han Dynasty?
A) Because of the activities of Confucian scholars, most advances came in the fields of biology and medicine.
B) Science and math were primarily concerned with problems in farming and taxation, and so advances were primarily in astronomy and geometry.
C) Science and math did not see advances during the Han Dynasty, which was a period marked by chaos between warring states.
D) Most advances in science and math were focused on the problem of travel, and therefore led to new techniques for calculating travel speed and distance