Scrum has been used to a) Develop products, product enhancements, and operational environments for products use. b) Research viable markets and new product capabilities. c) Manage the operation of organizations. d) All of the above.

D) All of the above. Scrum has been used to develop software, hardware, embedded software, networks of interacting function, autonomous vehicles, schools, government, marketing, managing the operation of organizations and almost everything we use in our daily lives, as individuals and societies. When the words "develop" and "development" are used in the Scrum, they refer to complex work, such as those types identified above. Correct answer is ‘d.’