[单选题]
According to the Bohr moy :e. 99bf508nbulpwfmke k* edel of the atom, the angular momentum of an af nq72cs4 uh.5wd8pl/u8yvd electron around the nucl8 p 4s/v7d.uyufwdnqacl 25h8 eus
A. could equal any positive value.
B. must equal an integral multiple of h.
C. must equal an integral multiple of h/2p.
D. decreases with time, eventually becoming zero.