In the last 5.5 million years, rifting action tore Baja California and California west of the San Andreas Fault from the ________.
A. Pacific Plate and piggybacked them onto the North American Plate
B. North American Plate and piggybacked them onto the Juan de Fuca Plate
C. North American Plate and piggybacked them onto the Pacific Plate
D. Nazca Plate and piggybacked them onto the Cocos Plate
E. Pacific Plate and piggybacked them onto the Juan de Fuca Plate
Answer: C
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