A buyer and his agent visit a listed property. The buyer loves the property and wants to purchase it. He speaks with the seller, who is at home at the time, and they come to an agreement regarding price and terms. They shake hands on the agreement, and the buyer happily leaves the property. His agent should:
a) Prepare the purchase agreement immediately.
b) Inform the seller's agent about the agreement.
c) Advise the buyer to consult an attorney first.
d) Wait for written confirmation before taking any action.