What Does the Textbook Conclude About the Canadian Tax System

What does the textbook conclude about the Canadian tax system?

A) That it is an effective means of redistributing income from richer to poorer.
B) That it is an effective means of diminishing poverty in Canada.
C) That it is ineffective at alleviating poverty through a redistribution of income.
D) That it effectively redistributes income but is only moderately effective at lessening poverty.