Option 1 -> Only considers statement A false, but statement B is also false according to the passage.
Option 2 -> Statement A is false (passage says 60 miles, not 200 miles); Statement B is false (passage indicates scientists NOW believe human activity is the cause, not that it's simply a natural process).
Option 3 -> Incorrectly includes statement C as false, when the passage clearly states "scientists now believe that human activity is the cause."
Option 4 -> Both C and D are actually true according to the passage, so this cannot be correct.
Hence, Option 2: (A) and (B) only -> Statement A incorrectly states 200 miles when the passage mentions 60 miles, and Statement B presents global warming as definitively a natural process when the passage explicitly states that while this view "had more supporters in the past," scientists now believe human activity is the cause -> correct