If a Consumer's Income Decreases,the Budget Constraint for CDs and DVDs

If a consumer's income decreases,the budget constraint for CDs and DVDs will

A) shift outward, parallel to the original budget constraint.
B) shift inward, parallel to the original budget constraint.
C) rotate outward along the CD axis because we can afford more CDs.
D) rotate outward along the DVD axis because we can afford more DVDs.