Tyler purchases 5 pounds of hot dogs per month when his monthly income is $2,000 and 4 pounds of hot dogs per month when his monthly income is $2,200. Tyler's income elasticity of demand for hot dogs is
A)2.33, and hot dogs are a normal good.
B)-2.33, and hot dogs are an inferior good.
C)0.43, and hot dogs are a normal good.
D)-0.43, and hot dogs are an inferior good.