A chart has 4 boxes on top of each other. The top box contains investment accounts, the next box contains savings accounts, the next box contains demand accounts, and the bottom box contains cash and currency in circulation. As you move up the chart, there is less liquid, and as you move down the chart, there is more liquid. The measure of how quickly an investment can be converted into cash is known as its __________.
A. Liquidity
B. Solvency
C. Profitability
D. Efficiency