Tanya is a lawyer. Nearly all lawyers dutifully represent their clients' best interests, but a few unethical ones charge exorbitant and fraudulent fees for services. Some lawyers become millionaires, while others work in the best interest of the public. However, all lawyers are bound by extensive ethical codes, which vary slightly by jurisdiction. If the statements above are true, which one of the following must also be true? ['Tanya works for the public sector.', 'Tanya charges exorbitant fees for her services.', "Tanya dutifully represents her clients' best interests.", 'Tanya is bound by extensive ethical codes.']