The assassination of Franz Ferdinand because it set the alliances into motion. That was the spark that started WW1. WW1 eventually led to WW2 and so on...
The correct answer is d. Egypt and Syria launched a surprise attack against Israel.
The Yom Kippur/Ramadan war was an armed conflict between Israel and the Arab nations of Egypt and Syria in October 1973. The conflict initiated when the coalition of Egypt, led by the president Anwar Sadat, and Syria, led by the president Hafez Al-Asad, launched a surprise attack against Israel during the Yom Kippur holiday, which that year happened to be also during the Islamic sacred month of Ramadan. The goal for the Arab nations was to recover Arab territories that were lost in previous wars against Israel: the Sinai for Egypt and the Golan Heights for Syria.
The top class was reserved for "Peninsulares" - people born in Spain (or in the Iberian Peninsula). The second was their children- it was based upon the ancestry and place of birth
The answer to the question asked above are the following
Cenozoic - 65 million years ago
Mesozoic - 251 million years ago
Paleozoic - 543 million years ago
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