Answer:
Mere-exposure effect
Step-by-step explanation:
The mere-exposure effect refers to the situation in which people prefers something because they are familiar with that by being expose to it. For example, when you see or hear something frequently, you start to like it. According to this, John's choice of cheese can be explained by the mere-exposure effect as John realized that he bought the Stilton cheese because he was exposed to it because of the image he had on the calendar in his kitchen.