The Gold Standard Act of 1900 ended the standard known as

full-reserve banking.
fractional-reserve banking.
bimetallism.
liquidity.

The Gold Standard Act of 1900 ended the standard known as bimetallism.

The Gold Standard Act of 1900 ended the standard known as bimetallism.

The Gold Standard Act of 1900 did not end the standard known as full-reserve banking or liquidity. It actually did not directly affect these banking practices at all.

The Gold Standard Act of 1900 was a United States federal law that established gold as the only standard for redeeming paper currency. It required the government to maintain a fixed value of gold for the US dollar. This effectively ended the practice of bimetallism, which is the use of both gold and silver as the basis for a monetary system.

Fractional-reserve banking is a banking system where banks keep only a fraction of their deposits as reserves, which allows them to lend out the rest. The Gold Standard Act did not end fractional-reserve banking; this banking practice continued to be used.

To determine the correct answer to your question, we can eliminate the options that are not affected by the Gold Standard Act. Therefore, the correct answer is bimetallism, as the act did indeed end the use of gold and silver as a dual standard for the US currency.