Danita rescues dogs from her local animal shelter. When danita's income rises by 7 percent, her quantity demanded of dog biscuits increases by 12 percent. For danita, the income elasticity of demand for dog biscuits is
a. Negative, and dog biscuits are an inferior good.
b. Negative, and dog biscuits are a normal good.
c. Positive, and dog biscuits are an inferior good.
d. Positive, and dog biscuits are a normal good.