Under California law, when is a real estate broker/salesperson required to give a copies of real estate agreements to the principal(s) - seller(s) and/or buyer(s)? a. At the time of signing by the principal(s) b. Within three business days of signing by the principal(s) signing c. Within three months of the signing by the principal(s) d. At the time escrow closes on the property that is the subject of the real estate agreement