The correct answer is: C. Marcian E. (Ted) Hoff.
Marcian E. (Ted) Hoff was the leader of the team of engineers at Intel who developed the first microprocessor, the Intel 4004. The Intel 4004 was a revolutionary device that integrated the arithmetic logic and control circuitry of a computer into one chip. This made it possible to build small, inexpensive computers that could be used for a variety of applications.
The other options are incorrect. Victor Poor was an engineer at Intel who worked on the development of the Intel 4004, but he was not the leader of the team. Stan Mazor was also an engineer at Intel who worked on the development of the Intel 4004. Seymour Cray was an engineer at Control Data Corporation who developed the Cray-1 supercomputer. None of these individuals headed the team of engineers at Intel who developed the first microprocessor.