The Yemen economy is least developed in the world and Yemen is a small oil producer and does not belong to the OPEC nations. And t relies heavily on other oil-producing companies and shared agreement with the government and this accounts for 75% of the government profits and 90% of the exports.
Since the passage was discursive, and the main topic being migration, G would be the best answer because it gives the reason why Tibetians are migrating, which is the Chinese invasion
