Your Teacher Has You Learn the Following: "One Is Bun

Your teacher has you learn the following: "One is bun, two is a shoe, three is a tree, four is a door, five is a hive, six is sticks, seven is heaven, eight is a gate, nine is a line, and ten is a hen." Then, he gives you a list of words to remember and instructs you to form an image associating the first listed word "frog" with "bun," which rhymes with "one" for the first word in the sequence.You picture a "frog-burger on a bun." Then you associate the shoe with the second listed item, and so on.You are

A) using acrostics.
B) forming a chain.
C) using a system.
D) using the keyword method.