单选题：A full tree of degree 3 is a tree in which every node other than

A full tree of degree 3 is a tree in which every node other than the leaves has 3 children. How many leaves does a full tree of degree 3 have if it has 127 nodes? @[C](2)

A. 41
B. 42
C. 85
D. 86




A.41
B.42
C.85
D.86


答案：C