Which of the Following Defines the "Store of Value" Function

Which of the following defines the "store of value" function of money?

A) A common measurement of the relative value of different goods and services.
B) The ability of money to hold value over time.
C) That the materials used to manufacture money are of medium grade or quality, so that people will not hoard money for its commodity value.
D) That money is widely accepted in exchange for goods and services.