Which amendment effectively invalidated the Dred Scot v. Sandford Supreme Court decision?

According to your text, one of the most troubling economic issues facing Britain today is the question of whether or not it should

a. provide economic aid to the Commonwealth. b. continue funding for welfare programs and pensions. c. join the single European currency. d. repeal the tax cuts implemented by the Thatcher government.

The Constitution has been changed slightly over time due to ______.

a. the supremacy clause b. the easy amendment process c. the process of judicial review d. the necessary and proper clause