A cat is classically conditioned to purr when it hears the refrigerator door open, because it contains the cat food. But the cat does not purr when it hears the pantry door open. The fact that the cat only purrs when the refrigerator door opens is most likely a result of:.
A) stimulus discrimination.
B) spontaneous recovery.
C) stimulus generalization.
D) extinction.

An economic system where all or most businesses are owned by government

"“forty or fifty years ago, many people thought that simply transferring technologies from industrialized to developing countries would close the technology gap. now we know that technologies developed in industrialized countries may not be suitable for use in other environments. they may require a particular type of infrastructure to operate. they may need specialized parts or knowledge to mend when they break we now understand that innovative capacity must be built in different ways." - united nations secretary-general ban ki-moon based on the secretary general's comments, which of these would be most important for a country to improve? a) native literature b) transportation grid c) cultural traditions d) construction styles

Which graph shows the temporary relationship between the aggregate price level and the aggregate quantity supplied? a. long-run aggregate supply curve b. aggregate demand curve c. short-run aggregate supply curve d. point of equilibrium