MUS Sampling Has All of the Following Advantages Over Other

MUS sampling has all of the following advantages over other statistical methods except which of the following?

A) Easier to apply than other statistical sampling approaches.
B) Sample sizes are relatively small.
C) It is a relatively easy way to make sure that negative balances and zero balances are included in the sample.
D) Usually results in a highly efficient sample size.
E) None of the above is an advantage.