What is known as the net asset value (NAV)? a. The closing price of the securities that comprise a particular fund's portfolio plus the value of any uninvested cash that the fund manager maintains for the fund b. A concept used in finance and economics, defined as a rational and unbiased estimate of the potential market price of a good, service, or asset c. The value of an entity's assets less the value of its current liabilities at the end of the trading day d. The difference between the replacement cost of a fixed asset and its book value appearing on the balance sheet