Which of the following responsibilities falls to a lawyer when representing clients in legislative bodies?

The responsibility that falls to a lawyer when representing clients in legislative bodies is to disclose that the representation is in a representative capacity. This is crucial as it ensures transparency in the lawyer's role and the nature of their advocacy. When lawyers advocate before legislative bodies, it is important for other legislators, stakeholders, and the public to understand that the lawyer is acting on behalf of a client rather than presenting their personal views or expert opinions. This distinction helps to avoid any potential conflicts of interest and clarifies the context of any arguments or positions that the lawyer may present.

Maintaining confidentiality at all costs could mislead others regarding the nature of the advocacy, especially if it involves the interest of a client that may be making a case for or against certain legislation. Advocating without stating their role would obscure the lawyer's representation and could create a false impression about the motivations behind their statements. Offering legal advice to the legislative body could also confuse the distinction between the advocate and the advisor roles, potentially leading to ethical dilemmas. Thus, option B aligns with the duty of transparency and clarity in legal representation within legislative contexts.