(Figure: Gadgets and Widgets) The graph shows the production possibilities for two countries, A and B. Which statement is correct? 
Definitions:
Vasoconstriction
The narrowing of blood vessels caused by contraction of the muscular wall of the vessels, which increases blood pressure.
Medulla Oblongata
The lower portion of the brainstem, which controls vital bodily functions such as respiration, heart rate, and blood pressure.
Hypothalamus
This part of the brain, positioned below the thalamus, plays a pivotal role in controlling the autonomic nervous system and pituitary gland activity, thereby regulating essential homeostatic functions including body temperature, thirst, hunger, and other equilibrium-maintaining systems.
Nuclei
The plural of nucleus, referring to the membrane-bound organelles found in eukaryotic cells that contain the genetic material (DNA) and control the cell's growth and reproduction.
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