The creation of the cabinet system during George Washington's presidency is best explained by the following option:
C. Presidents often lack expertise in certain areas of governance and can rely on the knowledge of others when making important decisions.
Washington established the cabinet to seek counsel from knowledgeable advisors in various government departments, recognizing that he could not manage the complexities of the federal government alone. This set a crucial precedent for future presidents to form a team of advisors to help inform their decisions and execute their policies effectively.