The most important attribute of money is general acceptability. Money is a medium of exchange that is widely accepted in transactions for goods and services. General acceptability means that people are willing to accept money as payment because they trust that it will be accepted by others. This trust is typically based on the stability and credibility of the issuing authority, such as a government or a central bank. Other attributes of money, such as homogeneity, divisibility, and relative scarcity, are also important, but they are secondary to general acceptability. Without general acceptability, money would not function as a medium of exchange, making it impossible to conduct modern commerce and trade. Therefore, the correct option is "general acceptability".