Ifthere are two goods and if income doubles and the price of good 1doubles, while the price of good 2 stays constant:

A. a consumer's demand for good 1 will increase only if it isa Giffen good for her.

B. a consumer's demand for good 1 will decrease only if it isan inferior good for her

C. a consumer's demand for good 2 will decrease only if it isa Giffen good for her.

D. a consumer's demand for good 2 will increase only if it isan inferior good for her.

E. None of the above

I wonder whether the answer is E, since there is no enoughevidence to prove Giffen good. Please show the steps, thankyou!