Detailed Instructions: In this task, you will be presented with a passage and have to answer a question based on your understanding of the events inferred from the passage. Among the entities, try to find the best entity that is most likely to fill in "_" and classify the answers based on options.
Problem:Seoul, South Korea (CNN) -- North Korea on Monday fired more projectiles into the sea off its east coast, South Korean officials said, urging Pyongyang to refrain from "tension-creating acts." But Pyongyang described the launches as a "regular military exercise." The South Korean Defense Ministry still needs to analyze exactly what the North has been firing for the past three days, said Choi Yong-su, an official in the ministry representative's office. They could be short-range missiles or a new kind of large-caliber artillery rocket, the ministry said. The North fired three projectiles into waters off its east coast Saturday and a fourth Sunday. It fired two more Monday, Choi said.North Korea says the launches are a "regular military exercise"North Korea has fired six projectiles into the sea over the past three days, Seoul saysThe South says they could be short-range missiles or large-scale artilleryThe North last week criticized the presence of a U.S. aircraft carrier in the region 
 Questions:Before last week, tensions in the region had eased from a period in March and April that included near daily _ threats of war against South Korea and the United States. (A) Seoul (B) South Korea (C) CNN (D) North Korea (E) South Korean (F) Pyongyang (G) South Korean Defense Ministry (H) North (I) Choi Yong-su (J) Choi (K) South (L) U.S.
Solution:
(D)