AdityaHongunti
Had Russian lieutenant colonel Stanislav Petrov not correctly judged the early warning system’s reports of an incoming nuclear missile on September 26, 1983, to be false and disobeyed orders from his superiors to retaliate, Russia and the United States would likely have entered a large-scale nuclear war. A. Had Russian lieutenant colonel Stanislav Petrov not correctly judged the early warning system’s reports of an incoming nuclear missile on September 26, 1983, to be false and disobeyed orders from his superiors to retaliate, Russia and the United States would likely have entered a large-scale nuclear war.
B. If Russian lieutenant colonel Stanislav Petrov had not correctly judged the early warning system that reported an incoming nuclear missile on September 26, 1983 to be false and then disobeyed orders from his superiors to retaliate, Russia and the United States likely would have entered a large-scale nuclear war.
C. Russian lieutenant colonel Stanislav Petrov likely prevented a large-scale nuclear war between the United States and Russia on September 26, 1983 by correctly judging that the early warning system’s reports of an incoming nuclear missile were false, disobeying orders from his superiors to retaliate.
D. On September 26, 1983, Russian lieutenant colonel Stanislav Petrov correctly judged that the early warning system’s reports of an incoming nuclear missile were false, disobeying orders from his superiors to retaliate and likely preventing the United States and Russia from entering a large-scale nuclear war.
E. On September 26, 1983, Russian lieutenant colonel Stanislav Petrov likely prevented the United States and Russia from entering a large-scale nuclear war when he disobeyed orders from his superiors to retaliate and correctly judged that the early warning system’s reports that a nuclear missile was incoming were false.
We have a conditional here: "If A had not done this, B would have done that."
We normally make it concise like this: "Had A not done this, B would have done that."
The basic structure of option (A) is the same:
Had SP not correctly judged reports to be false and disobeyed orders, Russia and US would have entered a nuclear war.
Hence, the correct answer is (A)
B. If Russian lieutenant colonel
Stanislav Petrov had not correctly judged the early warning system that reported an incoming nuclear missile on September 26, 1983 to be false and then disobeyed orders from his superiors to retaliate, Russia and the United States likely would have entered a large-scale nuclear war.
See the highlighted part: SP did not judge the warning system to be false. He judged the report of the warning system to be false.
This option implies that SP judged the warning system to be false. The 'that' clause 'that reported an ...' modifies the warning system.
So this is incorrect.
C. Russian lieutenant colonel Stanislav Petrov likely prevented a large-scale nuclear war between the United States and Russia on September 26, 1983 by correctly judging that the early warning system’s reports of an incoming nuclear missile were false, disobeying orders from his superiors to retaliate.
D. On September 26, 1983, Russian lieutenant colonel Stanislav Petrov correctly judged that the early warning system’s reports of an incoming nuclear missile were false, disobeying orders from his superiors to retaliate and likely preventing the United States and Russia from entering a large-scale nuclear war.
E. On September 26, 1983, Russian lieutenant colonel Stanislav Petrov likely prevented the United States and Russia from entering a large-scale nuclear war when he disobeyed orders from his superiors to retaliate and correctly judged that the early warning system’s reports that a nuclear missile was incoming were false.
SP did two things - judged the report to be false and then disobeyed orders.
The two elements "judged" and "disobeyed" should be parallel. Also, "judged..." should come before "disobeyed..." because he first judged and then disobeyed.
"disobeying orders" is not the natural effect of "judging the report to be incorrect". The two actions were performed by SP intentionally. Whatever may have been his judgement, he may still have obeyed orders.
Hence the use of comma + verb-ing is not correct as done in (C) and (D).
In (E), he disobeyed orders and judged reports to be false. The sequence is switched.