Final answer:
Joan Kroc, the widow of McDonald's magnate Ray Kroc, left $200 million to NPR upon her passing in 2003, highlighting her philanthropic legacy.
Step-by-step explanation:
The widow of a fast-food magnate who left $200 million to National Public Radio (NPR) when she died in 2003 is a) Joan Kroc. Joan Kroc was married to Ray Kroc, who is credited with the expansion and success of McDonald's as a global franchise. Her generous bequest to NPR was one of the largest monetary gifts ever given to a cultural institution and underscored her commitment to philanthropy and support for public broadcasting.