Please have a look of the mc question below and at the end, please clarify why you decide to choose that option. Thank you.

Suppose that the average income is higher than the median income. Which of the following can without any doubt increase the gap between the average and median income? Income of individuals in the first quintile increases (but remain lower than the median) and everything else is unchanged. Income of individuals in the third quintile decreases and everything else is unchanged. Income of individuals in the fifth quintile decreases and everything else is unchanged. O All of the above O None of the above