64 LR One Question 18
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Permalink Submitted by kaoriwat on Mar 16 2019
HI, Dave.
I chose B, but I am considering the answer.
So, the argument is (not)Computer Modeling -> (not) Increase traffic -> (not) resolving.
Answer B said, I think, that
(not)Resolving -> (not) Computer Modeling
So, The answer is reversed, isn't it?

Permalink Submitted by majorgeneraldave on Mar 18 2019
(B) says that if the city had not done computer modeling, then the crisis would not have been resolved. Using your abbreviations, (B) looks like this: (not)Computer Modeling -> (not) resolving.
The phrase "had thing X not happened. . ." means "IF thing X had not happened, then. . ."