We Could Use the Term "Snob Effect" to Describe Which

Multiple Choice

We could use the term "snob effect" to describe which of the following situations?

A) I get great satisfaction from collecting Soviet-era posters because few people have them.
B) I purchase the same e-mail software package as all of my friends and family so that we can exchange both mail and advice on technical information.
C) I purchase more chocolate bars when the price of chocolate bars falls.
D) I decide to purchase a good because a politician suggests it.