Where does the given sentence best fit … | [국회직 8급 영어] 21년 1회차 기출문제 상세 페이지

Where does the given sentence best fit in the passage?
It eventually turned out that the signal was indeed a false alarm due to human error: a computer operator had by mistake inserted into the U.S. warning system computer a training tape simulating the launch of 200 Soviet ICBMs.

Missile detection systems, like all complex technologies, are subject to malfunctions and to ambiguities of interpretation. (A) We know of at least three false alarms given by the American detection system. (B) For example, on November 9, 1979 the U.S. army general serving as watch officer for the U.S. system phoned then-Under-Secretary of Defense William Perry in the middle of the night to say, “My warning computer is showing 200 ICBMs in flight from the Soviet Union to the United States.” (C) But the general concluded that the signal was probably a false alarm, Perry did not awaken President Carter, and Carter did not push the button and needlessly kill a hundred million Soviets. (D) We also know of at least one false alarm given by the Russian detection system: a single non-military rocket launched in 1995 from an island off Norway towards the North Pole was misidentified by the automatic tracking algorithm of Russian radar as a missile launched from an American submarine. (E) These incidents illustrate an important point: A warning signal is not unambiguous.

(A)

(B)

(C)

(D)

(E)

주어진 문장이 들어갈 곳은 (D)이다.
주어진 문장의 “indeed a false alarm”(실제로 오경보였다)은 장군의 판단인 “the signal was probably a false alarm”(아마 오경보일 것)을 확인해 주는 결말이다. 따라서 그 판단이 나온 문장 바로 뒤, 러시아 사례를 여는 “We also know” 앞에 와야 한다.
(A): 아직 구체적 경보가 제시되지 않아 “the signal”이 가리킬 대상이 없다.
(B): “For example”로 시작하는 1979년 사례가 나오기도 전이라 결말이 먼저 나오게 된다.
(C): 결과가 먼저 밝혀지면 뒤의 “But the general concluded”(추정)와 시간 순서가 뒤바뀐다.
(E): 이미 러시아 사례로 넘어간 뒤라 미국 경보 시스템의 원인 설명이 흐름에서 떨어진다.