单选题：Given a tree of degree 6. Suppose that the numbers of nodes of d

Given a tree of degree 6. Suppose that the numbers of nodes of degrees 1, 2, 3, 4, 5, 6 are 3, 5, 2, 3, 1, 2, respectively. Then the number of leaf nodes must be: @[C](3)

A. 29
B. 31
C. 33
D. 35




A.29
B.31
C.33
D.35


答案：C