Final answer:
David, a buyer's agent, should not provide legal services, financial services, or appraisal services to the buyer as these require separate licensure and are outside the scope of his real estate duties.
Step-by-step explanation:
David is operating as a buyer's agent, and as such, he has specific duties he must adhere to when providing services to the buyer. There are certain services that are outside the scope of his real estate expertise or licensure. He should not provide legal services, as he is not an attorney.
Similarly, providing financial services such as loans or financial planning may require separate licenses and are not typically within the purview of a real estate agent’s responsibilities. While a real estate agent can provide market analyses, appraisal services are generally performed by a licensed appraiser to determine the value of a property. Therefore, of the options listed, David should not provide 'All of the above' services to the buyer.