"<span>D)the emperor and religious leaders of the Byzantine Empire refused to accept the authority of the pope" is the best option since this caused the most havoc. </span>
The "Third World" was defined as the unaligned countries that the US and the Soviet Union were trying to bring into the fold, and thus became a political battleground. I Hope I could help! :)
Have a wonderful rest of the day.
The last two are correct.
I think the answer would be C. Improving workers lives but leaving society's structure alone.