Which statements about Java classes are true? (Choose three.)

A. A Java class file may include more than one package statement.

B. A Java class file may include more than one import statement.

C. A Java class file may contain more than one comment.

D. Any instance fields within a class must be defined after the class name.

E. Any instance fields within a class must be defined before the class name.

F. Java supports macros, in which fragments of code within a class may be defined inside a Java file, separate from any top-level type declaration.