A client wants a large sum of money invested for 6-8 months before he retires. Upon retirement, he will decide how he wants to reallocate his money. For the time being, all of the following would be appropriate investments EXCEPT

[A] a municipal money market mutual fund
[B] Treasury Bills
[C] an immediate annuity which charges a single premium
[D] a mutual fund designed for short-term investments and charges no sales load