Concept:Money must possess certain fundamental qualities to serve its functions effectively.
Explanation:The main qualities of money include durability, portability, divisibility, uniformity, acceptability, and limited supply.
Limited supply is the same as scarcity in the context of money.
If money were abundant, its value would fall rapidly, so scarcity is necessary to maintain purchasing power.
"Availability" is not a standard quality, as it suggests unlimited presence.
"Indivisibility" is wrong because money must be divisible into smaller units.
"Convertibility" is not a basic quality of money in this list.
Thus, from the options given, scarcity is the correct quality of money.
Answer:B. Scarcity