According to the NAR settlement, buyer brokers cannot:

A is incorrect because buyer brokers can absolutely represent buyers in transactions. This is their primary function and a fundamental aspect of real estate brokerage. The settlement doesn't restrict their ability to represent buyers but rather places limitations on how they can be compensated.

C is incorrect because buyer brokers routinely work with multiple buyers at once through proper buyer representation agreements. The NAR settlement doesn't limit the number of clients a broker can represent simultaneously.

D is incorrect because negotiating on behalf of clients is a core function of buyer representation. The settlement doesn't restrict this fundamental brokerage activity but rather addresses compensation practices.