20. In the context of the passage, the information between the dashes(the highlighted phrase) mainly serves to:

Answer and Explanation

Your Answer is

Correct Answer is J

Explanation

The content of the dash in Lines 85-87 explains the while the apple is still by far the most common in the US in front of the dash, so choose J; option F only mentions 2011, but the original text wants to use 2011 Years of data prove that the apple is still by far the most common in the US, so this option is too narrow;