In Thinking About California's Political Geography,one of the Most Significant

In thinking about California's political geography,one of the most significant developments with respect to partisan politics is ______.

A) a noticeable split between a heavily liberal,Democratic north and a conservative,Republican south
B) a checkerboard of Republican and Democratic counties across the state,making it difficult to identify any geographic areas where partisans concentrate
C) solid Democratic majorities across all 58 counties
D) an east-west divide,whereby coastal regions are more liberal and Democratic,and inland regions are more conservative and Republican