(A) Before policy change, there was no advantage to having access to large metro airports.
❌ Irrelevant. Activist argues about disadvantage to those without metro access.
Does not affect causation.
(B) If many consumers are disadvantaged, policy should be reversed.
❌ Normative claim (what should be done).
Argument is about whether harm occurred, not policy reversal.
(C) Government regulation almost always benefits consumers.
❌ Too broad and unnecessary.
Argument only needs this specific case, not “almost always.”
(D) At the time of the regulatory change, major airlines maintained less profitable routes at least partly because of government requirements.
✅ Matches pre-thinking.
If majors kept routes due to regulation → deregulation caused them to abandon routes → harm to small-airport consumers.
If this is false → majors may have dropped routes anyway → activist’s causal claim collapses.
(E) Regional airlines lack resources to provide same quality service.
❌ Not required. Activist’s argument is about access, not quality.
Even equal quality wouldn’t fix loss of routes.