Han Wudi decided to go on the offensive against the Xiongnu primarily because
a. He intended to invade the Persian empire from Central Asia
b. Other methods were not effective to pacify the Xiongnu and stop their raids
c. The economy was stagnant and the buildup to war provided jobs
d. He wanted to capture the wealthy Xiongnu cities
Han Wudi decided to go on the offensive against the Xiongnu primarily because "b. Other methods were not effective to pacify the Xiongnu and stop their raids," since in fact Wudi wanted to avoid war if at all possible.
