Use the following to answer questions:
Figure: Four Markets for Online Movie Rentals 
-(Figure: Four Markets for Online Movie Rentals) Use Figure: Four Markets for Online Movie Rentals.Which of the graphs shows what may happen if D1 or S1 is the original curve and D2 or S2 is the new curve,and if some of the online stores that rent online movie rentals close?
Definitions:
Brainstem
The oldest part and central core of the brain, beginning where the spinal cord swells as it enters the skull; the brainstem is responsible for automatic survival functions.
Medulla
The base of the brainstem; controls heartbeat and breathing.
Visual Cortex
The part of the cerebral cortex involved in processing visual information, located in the occipital lobe of the brain.
Thalamus
The brain’s sensory switchboard, located on top of the brainstem; it directs messages to the sensory receiving areas in the cortex and transmits replies to the cerebellum and medulla.
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