문제 내용: 다음 글의 흐름상 어색한 문장은?
선택지 1: These conspiracy theorists claim that the United States knew it couldn't compete with the Russians in the space race and was therefore forced to fake a series of successful moon landings.
선택지 2: Advocates of a conspiracy cite several pieces of what they consider evidence.
선택지 3: Crucial to their case is the claim that astronauts never could have safely passed through the Van Allen belt, a region of radiation trapped in Earth's magnetic field.
선택지 4: They also point to the fact that the metal coverings of the spaceship were designed to block radiation. If the astronauts had truly gone through the belt, say conspiracy theorists, they would have died.