plz help me check it , thx

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? 0 Income of individuals in the fth quintile increases and everything else is unchanged. 0 Income of individuals in the fourth quintile increases and everything else is unchanged. 0 Income of individuals in the rst quintile increases (but remain lower than the median) and everything else is unchanged. All of the above 0 None of the above