A.left, right, setLeft, and setRight must be private.

B.isValid must be public.

C.setLeft and setRight must be protected.

D.left and right must be private.

A.MyInterface5

B.MyInterface3

C.MyInterface2

D.MyInterface4

E.MyInterface1

A.BasicFileAttributes attributes = Files isDirectory (path);

B.BasicFileAttributes attributes = Files.readAttributes(path, BasicFileAttributes.class

C.BasicFileAttributes attributes =Files.getAttribute (path, ''insdirectory'');

D.BasicFileAttributes attributes = Files, readAttributes (path, FileAttributes, class);

A.The compilation fails.

B.1.99,2.99,0

C.1.99,2.99,0.0

D.1.99,2.99

A.prefix+Test.name

B.new Test().prefix+new Test().name

C.Test.getName+prefix

D.Test.prefix+Test.getName()

E.prefix+name

F.Test.prefix+Test.name