Which of the Following Is an Example of a Self-Fulfilling

Which of the following is an example of a self-fulfilling prophecy?

A) Chad says, "I am going to buy my mother a sweater for her birthday" but ends up buying her a scarf.
B) Margaret says, "I am going to hate this party!" and then has a bad time at the party.
C) Snowy says, "You'd better buy the diamond ring now, because the sale ends today," and the customer does buy it.
D) Xu says, "I am going to make the best pie anyone has ever eaten!" and her family does eat the pie.