Will Feckless Unexpectedly Inherits $10,000 from a Rich Uncle

Multiple Choice

Will Feckless unexpectedly inherits $10,000 from a rich uncle.He is observed to consume fewer hamburgers than he used to.

A) Hamburgers are a Giffen good for Will.
B) Hamburgers are a normal good for Will.
C) Will's Engel curve for hamburgers is vertical.
D) Will's Engel curve for hamburgers is horizontal.
E) Will's preferences are not homothetic.