Why was the lingqu canal built?
a. to irrigate farmland
b. to improve trade routes
c. to allow the emperor to travel by water to other parts of china
d. to transport troops and supplies

i will give medal and 18 points

D (This is late but :P)

Explanation:

The greatest canal built under Qin Shi Huangdi was the Lingqu Canal, which was built to transport supplies for the army. It connected two major rivers and allowed Qin Shi Huangdi's empire to expand in the southwest. A common Chinese saying is, "In the North there is the Great Wall; in the South there is the Lingqu canal."

answer=(oversee the conversion of peacetime industry to war industry)

hope this : d

i dont know the answer sorry but if i knew it i would of told you