Answer:
a) Japan formed an alliance with China to protect east asian economic interests
Explanation:
<span>Assuming that this is referring to the same list of options that was posted before with this question, <span>the correct response would be that the North had better industrial capabilities, which allowed them to produce more war materials. </span></span>
Here are some of the weapons first used in WWI. Airplanes, Derigables, poison gas, flamethrower, and tanks. Other weapons that were invented before the war but not used on a wide scale or were not reliable until WWI were the machine gun, submarines, torpedoes, small mortars and very large caliber artillery. WWI also saw the use of the radio for the first time in combat conditions.
