Question

to disparity between the earnings of the poor and the rich has widen in the last few decades....Correct the sentence

Answer 1

The disparities between the earnings of the poor and the rich have widened during the last few decades.

Answer 2

The correct answer is 'has widened in'

'Has' is to be followed by 'V3' that is 'widened'. Also, 'in' should be used to show time duration.