If a Consumer Maximizes Her Preferences Subject to Her Budget

If a consumer maximizes her preferences subject to her budget by choosing a consumption bundle where the ratio of her marginal utilities of shelter and food, MU_S/MU_F, is greater than the ratio of the prices of shelter and food, p_S/p_F, then she must

A) be consuming food but no shelter.
B) be consuming shelter but no food.
C) believe that shelter is a "bad."
D) be consuming both food and shelter.
E) not be spending all of her income.