To answer this question, the user needs to have some knowledge about the different types of microprocessors and their manufacturers.
Option A: Motorola is not the correct answer. Motorola is a company that has manufactured microprocessors, but it is not the company that introduced the Pentium series of microprocessors.
Option B: Stephen Mors is not the correct answer. Stephen Mors is not a person or a company associated with the introduction of Pentium series of microprocessors.
Option C: Intel is the correct answer. The Pentium series of microprocessors were introduced by Intel, a well-known semiconductor manufacturing company.
Option D: ATMEGA is not the correct answer. ATMEGA is a microcontroller series developed by Atmel Corporation, and it is not associated with the Pentium series of microprocessors.