Answer:
D
Explanation: America hated the fact that China was being invaded and thus made an oil embargo. This was crucial as that Oil was needed for their war machine causing them to use other means that didn't require infantry mechanization. Although America didn't like the tripartite fact and knew that Japan was on a war raging path they simply though embargoes would do the trick. It did not but the very presence in the Pacific with a large navy, new B-17's and a recovering economy was indeed the greatest threat to the Japanese and their goals for Asian supremacy