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

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

A) The medium of exchange was too high.
B) Your neighbor's unwillingness to mow your 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) Your unwillingness to provide British-accent tutoring services reflects that too much fiat money is available.