The following questions refer to the figure below of a 3D CT of the lumbar spine, lateral view. 
-Which line points to the inferior endplate of L4?
Definitions:
Ceteris Paribus
A Latin phrase meaning "all other things being equal," used in economics to isolate the effect of one variable by holding other relevant factors constant.
Quantity Changes
Variations in the amount of goods or services produced or consumed in response to changes in market conditions, such as price or consumer preference.
Price Changes
Variations in the cost of goods or services in the market over time.
Ockham's Razor
A principle stating that in explaining a thing, no more assumptions should be made than are necessary.
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