When Are Multiple Subcultures MOST Problematic

When are multiple subcultures MOST problematic?

A) when they are compatible with the overarching corporate culture and are supportive of strategy-execution
B) when they don't clash and coordinating efforts to craft and execute strategy within each subculture is relatively easy
C) when they foster teamwork and support a collaborative approach to strategy execution
D) when they embrace conflicting business philosophies that are inconsistent with superior strategy execution
E) when they guide management in coming up with consistent approaches to executing company strategies