单选题
Given: 
Which statement is true?（）
发布日期：2021-01-28
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.
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