What role did hideki tojo play in wwii?

Hideki Tōjō was a prominent Japanese soldier, who became prime minister of Japan during World War II, between 1941 and 1944. He held other important positions as Minister of War (1940-1944), Minister of Foreign Affairs (1942), Minister of Education (1942) or chief of the Army General Staff (1944).

He was the intellectual architect of the Japanese invasion of Manchuria, which eventually led to the war against China and, later, the world war. Tōjō had a charismatic personality and of great preponderance in the Japanese Army. During the world war, while he was prime minister, in the territories occupied by the Japanese armed forces numerous war crimes were executed, such as the execution of prisoners or even the use of chemical and biological weapons. In metropolitan Japan itself, the military police (Kenpeitai) and other security forces turned the country into a real police state, while political life was reduced around the para-fascist movement Taisei Yokusankai, or the Imperial Regime Support Association . As a result of the cascade of military defeats that followed one another from 1942 and 1943, Tōjō was forced to resign from all positions in July 1944.

After the end of the war, he was arrested by the new American authorities. He was tried in the International Military Criminal Court for the Far East, who sentenced him to death for Japanese war crimes, being hanged on December 23, 1948. Subsequently, some historians have denounced that during the Tokyo trials, on the part of the Americans, many political responsibilities of the emperor Hirohito were unloaded in the own Tōjō, making him responsible to him and practically exonerating to the emperor.

d is the best answer for this question.

a. the astrolabe could determine the correct latitudinal location of the ship