Answer :
It was Japan's war with China which ultimately led to the US breaking off negotiations with the Empire of Japan. This action led to the continued oil embargo with Japan, and preceded the events that would later occur at Pearl Harbor.
The action that broke off the negotiations between Japan and the United States was b. Japan’s invasion of Indochina.
The Japanese kept wanting to expand in WWII and to this effect, invaded Indochina which was under the control of the French.
This was an escalation of the war to the United States, and they decided that Japan did not want peace. The negotiations between both nations subsequently broke down.
In conclusion, option B is correct.
Find out more on Indochina at https://brainly.com/question/893541.