Which sentence correctly uses “crucial”？ （）

A、It is crucial the problem is tackled immediately.

B、Getting a college degree could be crucial your prospect of finding a job.

C、Establishing a shared destiny among ethnic groups is crucial to achieving ethnic harmony.

D、Kinkeeping plays crucial role in a family’s health and well-being.

正确答案：Establishing a shared destiny among ethnic groups is crucial to achieving ethnic harmony.