When Her Income Increased from $30,000 to $40,000,Toby's Consumption of Macaroni

Multiple Choice

When her income increased from $30,000 to $40,000,Toby's consumption of macaroni decreased from 8 kilograms to 6 kilograms and her consumption of soy burgers increased from 3 kilograms to 4 kilograms.What can we conclude for Toby

A) Macaroni and soy burgers are both normal goods with income elasticities equal to 1.
B) Macaroni is an inferior good and soy burgers are normal goods; both have income elasticities of 1.
C) Macaroni is an inferior good with an income elasticity of -1, and soy burgers are normal goods with an income elasticity of 1.
D) Macaroni and soy burgers are both inferior goods with income elasticities equal to -1.