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 217 nodes? @[C](2)

A. 71
B. 72
C. 145
D. 146




A.71
B.72
C.145
D.146


答案：C