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SUBMIT YOUR IDEAQuestion 3 asked, "By how many percentage points did 2015 differ from 2014?" The solution subtracts 2015 from 2014, resulting in a negative difference, which is wrong. The question didn't ask "By how many percentage points did 2014 differ from 2015?" so 2014 should be subtracted from 2015 and the difference is positive and less than 1%.
Right on @David-Carnes, I agree with both of your points. Glad to know I'm not the only one that looked at the official solution and didn't agree with answer 2 and that answer 3 was flat out wrong.