Graduating from College,getting a Job,or Getting Married Can Change the Possessions

Graduating from college,getting a job,or getting married can change the possessions that we desire to have.This can be best thought of as an example of

A) how age changes our information processing.
B) a periodic and random transformation of our purchases over time.
C) changes in our personal circumstances influencing the ideal state.
D) external information search transformed by changing beliefs.
E) the problem recognition process as influenced by marketer-driven factors over time.