Final answer:
Congress exercised its delegated power, an authority explicitly granted by the Constitution, to pass the Women's Suffrage Centennial Commemorative Coin Act in 2019, which allowed for the minting of a special silver dollar in 2020.
Step-by-step explanation:
In passing the Women's Suffrage Centennial Commemorative Coin Act in 2019, Congress used its delegated power. This power is explicitly granted by the Constitution under Article I, Section 8, which details the enumerated powers of the legislature. Among these powers is the ability to coin money, regulate its value, and fix the standard of weights and measures.