Which one of the following, if substituted for the condition that Gold cannot be shown in any week in which Ping is s...

shaase on September 2, 2020

difference between A and B?

What is the difference between answers A and B? They seem to be stating the same thing.

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Emil-Kunkin on April 25 at 06:53PM

One is if r then g, the other is if g then r.