Recent events in Hong Kong, including the Occupy Central mov

Recent events in Hong Kong, including the Occupy Central movement in 2014 and the booksellers’ disappearance in 2015-16, suggest that there are heightened tensions at various levels between mainland China and Hong Kong. Of the following three factors: HK’s colonial legacies, Mainland’s lack of progress in political reforms, or the generational change in HK (younger people view the Mainland more negatively), which one do you think is the largest obstacle to the fostering of a better Mainland-HK relation?Write a 500-600 word response to the above question, clearly explaining your choice and reasons