Answer:
D. Argentina
Step-by-step explanation:
The Falkland Islands are archipelago that is comprised of 778 islands, with only two of them being larger. The islands have a territory of 12,000 square km, and a population of 3,398.
These islands are officially an overseas territory of the United Kingdom. They do have self-governance, but the United Kingdom is responsible for their defense and their foreign affairs.
These islands are located east of the southernmost part of South America. The closest country to them is Argentina. Argentina claims these islands as its own, and it doesn't recognize the British governing of it. This led to lot of tensions in the past and a big military conflict was on the verge of breaking down and to become a full scale war between the United Kingdom and Argentina.