Answer: The correct answer is A. $100,000
Explanation: The reserve requirement is a regulation by the central bank that sets the minimum amount of reserves that must be held by a commercial bank.
The reserve ratio is the portion of checkable- deposit liablities that commercial banks must hold onto, rather than use for it's primary activities.
Excess reserves occurs in a situation where the actual reserves is greater than the estimated reserves
Computation of Execess reserve: Here, It is set at 10% of the checkable-deposit liabilities which is $9million
10% of $9,000,000 = $900,000
Actual reserves - Estimated Reserves = Excess reserves
$1,000,000 - $900,000 = $100,000