Lisa Goes to the Local Appliance Store and Buys an Oven

Lisa goes to the local appliance store and buys an oven on credit. The store extends her credit. The store's security interest in the oven perfects when the store:

A) notifies consumer credit agencies of the existence of the security interest
B) gets Lisa to agree that the oven will be a security
C) posts notice of Lisa's security interest in the newspaper
D) posts notice of its security interest in a "public location"
E) none of the other choices