[单选题]
The distance between adjacent orbit radii in a-.n x, w (i(zau4emzia hydrogen at7cps ;u.kf)n(qa/mp qr 9ezd .;nqi5com
A. increases with increasing values of n.
B. decreases with increasing values of n.
C. remains constant for all values of n.
D. varies randomly with increasing values of n.