In Economic Terms,how Would Gina State What Has Happened When

Multiple Choice

In economic terms,how would Gina state what has happened when her neighbor says he is unwilling to help her mow her lawn because Gina is unwilling to help him teach his kids how to speak with a British accent?

A) The medium of exchange was too high.
B) Gina's neighbor's unwillingness to mow her lawn reflects a lack of store of value.
C) The double coincidence of wants was not satisfied.
D) The three functions of money were not satisfied.
E) Gina's unwillingness to provide British-accent tutoring services reflects that too much fiat money is available.