While Having a Coffee at Tim Horton's, a Friend Suggests

Multiple Choice

While having a coffee at Tim Horton's, a friend suggests a new book you should read. Later that day you are at the bookstore and go to buy the book. But you cannot remember the title. As you leave, you walk by the Tim Horton's and the title comes back to you.
This illustrates the principle of

A) memory decay
B) encoding specificity
C) mood congruency
D) explicit recall
E) retroactive decay