What accurately describes the requirements banks must me under a fractional reserve banking system?

In a fractional reserve banking system, banks are required to hold a fraction of their deposits as reserves, either in cash or as deposits with the central bank, while they can lend out the remainder. This reserve requirement varies by country and is set by the central bank to ensure liquidity and stability in the banking system. Banks must manage their reserves carefully to meet withdrawal demands from customers while maximizing their ability to extend credit. Additionally, they are subject to regulatory oversight to ensure compliance with these requirements.