单选题：Which line is the right sequence to declare in one compile unit?

Which line is the right sequence to declare in one compile unit? ( ) @[A](2)

A. package，import，class
B. class，import，package
C. import，package，class
D. package，class，import




A.package，import，class
B.class，import，package
C.import，package，class
D.package，class，import


答案：A