关于树myTree=['a',['b',['d',[],[]],['e',[],[]]],['c',['f',[],[]],[]]]的说法，何者正确？
A.左子树是['b',['d',[],[]],['e',[],[]]]B.左子树的根是'b'C.右子树是['c',['f',[],[]],[]]D.右子树的根是'e'正确答案：左子树是['b',['d',[],[]],['e',[],[]]]；左子树的根是'b'；右子树是['c',['f',[],[]],[]]