I'm pretty sure the answer is D :)
"Nasser's decision threatened British and French stock holdings in the Company and, as the Canal afforded Western countries access to Middle Eastern oil, also threatened to cut off Europe's oil supply." according to an article.
Answer:
Agriculture is the basic source of food supply of all the countries of the world—whether underdeveloped, developing or even developed. ... Raising supply of food by agricultural sector has, therefore, great importance for economic growth of a country.