Solutions

Hi, this is a type of multi linear game that appears to be getting slightly more common, and I like to approach this by setting up essentially all the possible combos with a yes/no option. There are only twelve things that vary here (if each organism responds to each antibiotic) so I'd probably set it up as follows F _ _ _ _ G _ _ _ _ H _ _ _ _ W X Y Z We know that all respond to either two or three of the drugs, and that there are either two or three yesses for F. We also know that if w then X, and that any org that responds to f responds to g. Finally we can place an f in y, so we have F _ _ F F G _ _ G G H _ _ / / W X Y Z We also know that since there is at most one more F, that f would have to go in X, because if we put an F in w that would force X into all four spots. For this question we know that Y and Z cannot respond to H, so we can pick D.