Unlike other neurological cells, olfactory cells have the ability to regenerate

You are treating a man who has been suffering from a relatively short-term bout of major depressive disorder. His symptoms started after a major life stressor, and you know that in such cases proper therapy is often quite effective in bringing about a full recovery. When he asks you if he's going to be better soon, you might say to him, "the ________ is very good!"

a. incidence b. prevalence c. prognosis d. etiology

When we look at a white house, we can recognize it as a white house by day or night and from any angle. This is due to perceptual ______

a. closure c. reversibility b. constancy d. coherency