Nathaniel's Wife Cannot Sleep Through the Night

Nathaniel's wife cannot sleep through the night. She claims that her husband seems to stop breathing in his sleep and then suddenly jerks awake, gasping for breath. This not only disturbs his sleep, it also awakens her. It is likely that Nathaniel

A) has narcolepsy.
B) is experiencing night terrors.
C) has sleep apnoea.
D) has developed pseudoinsomnia.