Which of the Following Approaches to Process Improvement Could Be

Which of the following approaches to process improvement could be described as process benchmarking?

A) Employees at McDonald's ignore the way they have always processed customer orders and design an entirely new way to do so.
B) Employees at the campus housing and dining service visit Ritz Carlton to pick up ideas on managing long-term guests.
C) Employees at Ford purchase automobiles from an array of car manufacturers and take them apart to get design ideas for their next generation Taurus.
D) Employees at XEROX take classes in quality improvement and make small, incremental changes to their order filling processes.