The statement that BEST expresses the meaning of the cartoon is:
A. Different groups may have different ideas, but compromise is vital to a successful democracy.
The cartoon illustrates the importance of compromise in the context of navigating political challenges, as indicated by the signs pointing to "Compromise" that are being passed. The dome's exclamation about how it ended up at the "Fiscal Cliff" suggests that a lack of compromise led to a problematic situation.