I believe the correct answer to this would be A). Epidemics
Saudi Arabia will develop different types of industries if they got expertise in producing oil.
<h3>
What happened when Saudi Arabia exports more oil?</h3>
When Saudi Arabia produces more oil, it will be able to do more exports to other countries. This will help them to develop better opportunities in the domestic market.
The foreign markets will offer increased prices over exports of oil which will boost the economic position of the country. This economic development leads to better infrastructure and facilities to the citizens.
Therefore, the option B is appropriate that Saudi Arabia will focus on developing more industries.
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<span>D. Two Mongol attacks on Japan failed when storms and typhoons nearly destroyed the Mongol fleets on both occasions. Because of all the options above this is the only one that can justify why they failed in the invasions in Mongol side or perspective. While the other side glorify the victory of the Japanese letter D. gives the reason the Mongol lose because of the typhoon not because of the Japanese.</span>