Good a Has an Income Elasticity Equal to -1

Multiple Choice

Good A has an income elasticity equal to -1.0 and a cross price elasticity with respect to Good B of 0.9. Then:

A) ​Good A is an inferior good and Goods A and B are substitutes.
B) ​Good A is an inferior good and Goods A and B are complements.
C) ​Good A is a normal good and Goods A and B are substitutes.
D) ​Good A is a normal good and Goods A and B are complements.