单项选择题
A.add import animals.mammals.*; at line 2 in Salmon.java
B.add import animals.fish.*; at line 2 in GrizzlyBear.java
C.add import animals.fish.Salmon.*; at line 2 in GrizzlyBear.java
D.add import animals.mammals.GrizzlyBear.*; at line 2 in Salmon.java B