In states which apply the equal dignity rule, which of the following actions requires an agent for a principal to have a written agency agreement?

	A.	retaining an attorney to collect a business debt owed to the principal.
	B.	purchasing office supplies for the principal's office.
	C.	hiring an independent general contractor to renovate the principal's office building.
	D.	signing a contract to purchase an interest in underdeveloped land for the principal.