[单选题]
The wave equation for hydrogen has solu o+v5o0a gj/hptions .vrkzo0:m x3rie:ldq5 ;s q c1only if the three quantum numbers , , and meet certain conditions. One of these conditions specifies that n
A. can be any real number.
B. can be any non-negative integer.
C. can be any integer.
D. can be any positive integer.