"Spontaneous recovery occurs when:________

A. A stimulus to which the subject has been habituated to is removed.
B. A stimulus to which the subject has been sensitized to is removed.
C. A stimulus to which the subject has adapted to is removed.
D. A stimulus to which the subject has been habituated is removed and then returned later.
E. A stimulus to which the subject has been sensitized to is removed and then returned later."