[单选题]
The probability of finding an electro*v)vmtbn *oa)n in a hydrogen atom k .gr)rt 7o3lg1 0hah.zb2qkx e(d7jhis directly proportionh20e 7o h1z..rk xq drka g7t(hg3lb)jal to its
A. energy.
B. momentum.
C. wave function.
D. square of the wave function.
