Only a few people concerned have

Only a few people concerned have （）to the confidential atomic energy data.

admission

permission

access

​entrance

A.admission：承认；B.permission：允许，许可；C.access：接触的机会；D.entrance：进入，have access to：有机会，能接触，选C。句意：只有少数有关人员能够获得原子能机密数据。