If Labor's Share of the Income Paid to American Resource

If labor's share of the income paid to American resource suppliers is broadly defined as the sum of wages and salaries and proprietors' income, we can say that labor's relative share has

A) remained approximately constant since 1900.
B) increased dramatically at the expense of capitalist income.
C) declined by about one-third since 1900.
D) decreased because of the decline of unionism.