The only true option from the list would be that "<span>In time a fifth group was added to the caste system--the untouchables," since this was a later development and not an initial part of the system. </span>
Before the bombing of Pearl Harbor by the Japanese, most Americans were hesitant to engage in another European war (the first one being WWI). American sentiment began to change, however, after the Germans began sinking American ships.
Answer:
he wanted to change slavery
