Rachel Bought a Sandwich Maker

Rachel bought a sandwich maker. The shopkeeper assured her that it was a very good and useful product. After using the sandwich maker for two months, Rachel found that using it was time consuming and that it also consumed a lot of electricity. So, she stopped using it. Therefore, Rachel has incurred a(n) _____ in buying the sandwich maker

A) private cost
B) external cost
C) external cost.
D) implicit cost
E) explicit cost