Which one of the following is correct about the liquidity of currency?
A.
The liquidity of M1 is higher than the liquidity of M2
B.
The liquidity of M2 is higher than the liquidity of M1
C.
Since both M1 and M2 are currency, they have the same liquidity
D.
Sometimes the liquidity of M1 is higher than M2, while sometimes the liquidity of M2 is higher than M1