单选题
发布日期:2022-07-10
The code will compile without changes.
The code will compile if public Tree() { Plant(); } is added to the Tree class.
The code will compile if public Plant() { Tree(); } is added to the Plant class.
The code will compile if public Plant() { this('fern'); } is added to the Plant class.
The code will compile if public Plant() { Plant('fern'); } is added to the Plant class.
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