Who produced the earliest incarnation of the technology that came to be known as the "mouse"?A. Apple Computer, Inc, who introduced the device to the world with the Macintosh.B. Doug Englebart and his team at the Standard Research Institute, as demonstrated in "The Mother of all Demos."C. A design team at the Xerox Palo Alto Research Center (PARC), as part of the Xerox Star workstation computer.D. Microsoft Corporation, as a required accessory for the Windows 95 operating system.E. A and B, above.