From my previously gained knowledge from my Japanese classes, the answer would be D. Because Japan didn't really that much of a population boom until the 20th century because they whole island was not yet inhabited. They didn't really feel like spreading Buddhism because it didn't become a popular religion until the 20th century, and the US had nothing to do with Japans wanting of more land. They gained land mainly from China, so the long-standing rivalry between China and Japan would be the best answer.
The Arab country to tried to achieve peace with Israel was Egypt. The Egyptian president Anwar Sadat signed a peace treaty with Israel. The international reaction was that of shock. Because Egypt became the first ever Arab country to sign a peace treaty with Israel that officially recognized it as a country. Because of this, Egypt temporary was suspended from the Arab League and Anwar was assassinated.
The Black Death was a plague that started in Central Asia in 1338 then it reached to China in 1346 One false rumor was that the moguls started it which was not true It affected the Black Sea port by 1347. It killed from 75 to 200 million people. Then Europe was a victim of The Black Death 1346 and lasted until 1353. Cracow and Poland were not affected by the Black Death.
I know for a fact that it's D. The Zealots