[单选题]
The distance between ad:i/s wrn 3 :qc0hny tq f72zquy-qv4s3jacenzc34s9br r q/u0u;kfv t orbit radii in a hydrogen atom
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.