单选题：A full tree of degree 4 is a tree in which every node other than

A full tree of degree 4 is a tree in which every node other than the leaves has 4 children. How many leaves does a full tree of degree 4 have if it has 257 nodes? @[C](2)

A. 63
B. 64
C. 193
D. 194




A.63
B.64
C.193
D.194


答案：C