I believe the answer would be d. but not 100% sure
World War I was really the fist "total war" in the sense that practically all available manpower and resources were used to fight the enemy. This meant that there were no "breaks" and very few rules to the fighting.
Answer:
Cyrus the Great allowed conquered people to keep their religious beliefs.
Explanation:
I just answered this in my lesson.
Answer:
There are many religions and philosophies which are clearly monotheistic. Mono is a prefix meaning "one", so monotheistic means one being/god.
Some examples would be Christianity, Judaism or Islam. These are all fairly clear so there isn't much verification needed, although there are many online organizations to use as reference.