What Is the Most Common Way to Measure Income Distribution

What is the most common way to measure income distribution?

A) Divide the population into equal size groups and examine each group's distance from the median income
B) Divide the population into equal size groups and examine each group's relative share of the total income
C) Determine the income level where families spend a certain percentage of their after-tax income on necessities
D) Measure each individual's income as a function of their distance from the average Canadian income
E) Plot average Canadian family income over time, controlling for inflation