A. A growing tumor secretes hormone Y, which stimulates the gland that secretes hormone X

B. Cells of a growing tumor manufacture hormone X in unregulated fashion

C. Negative feedback from a tumor that hypersecretes hormone Z inhibits the gland that secretes hormone X

D. Hormone X is secreted by a growing tumor that is in the anterior pituitary gland

E. Hormone X is secreted in unregulated fashion by a tumor growing in a tissue that does not normally secrete hormone X