Given: Which statement is true?（）

• 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.