Which of the following committees may propose amendments to the national bylaws?

The Board of Directors is the correct answer because this body is specifically designated to oversee the governance of the organization and has the authority to propose amendments to the national bylaws. The Board is composed of individuals who are well-versed in the organization's mission, objectives, and operational structure, enabling them to make informed decisions regarding necessary changes to the bylaws that will enhance the ability of FBLA to fulfill its goals.

The other options do not hold the same authority. For instance, while the Executive Committee may handle operational decisions and recommendations, it does not have the formal power to amend the bylaws. The National Council, often a group focused on specific initiatives, may make suggestions or engage in discussions about bylaws, but they lack the authority to formally propose amendments. Similarly, chapters of FBLA play an important role at the grassroots level and can advocate for changes, but they do not have the official capacity to propose amendments to the national bylaws.