A、The code will compile without changes.

B、The code will compile if public Tree（）{Plant（）；} is added to the Tree class.

C、The code will compile if public Plant（）{Tree（）；} is added to the Plant class.

D、The code will compile if public Plant（）{this（"fern"）；} is added to the Plant class.

E、The code will compile if public Plant（）{Plant（"fern"）；} is added to the Plant class.