I am currently meeting with a small group weekly/sometimes bi-weekly (East Village Area). We will also be meeting via Skype and using google docs to keep track of the questions that we would like to discuss ahead of time. If interested, PM me.
https://7sage.com/lesson/inout-game-1-questions-part-1/?ss_completed_lesson=1197 "IF YOU DON'T KNOW CONDITIONALS YOU HAVE NO BUSINESS DOING THIS TEST" - LOL.
By the way, the reason that that is the credited answer is because it satisfies the antecedent (sufficient condition) and falsified the consequent (necessary condition). This is exactly what must be so if material conditionals are false.