The Income Effect of an Increase in the Price of Salmon

The income effect of an increase in the price of salmon

A) is the change in the demand for other types of fish, for example trout, that result from a decrease in purchasing power.
B) is the change in the demand for salmon when income increases.
C) refers to relative price effect - salmon is more expensive compared to other types of fish - which causes the consumer to buy less salmon.
D) refers to the effect on a consumer's purchasing power which causes the consumer to buy less salmon, holding all other factors constant.