Why Was It Significant That the 1964 Republican Presidential Candidate

Why was it significant that the 1964 Republican presidential candidate was from Arizona?

A) It represented a larger party shift toward the more conservative South and West.
B) It signified the growing political power of liberal elements in the South and West.
C) It marked the importance of growing American trade ties with Mexico.
D) It symbolized a growing interest in conservation of various natural environments.