The question that made us think of coblin

[Collin Li]

For whoever put D, i'm sorry but you are unfortunately incorrect. "Entrepreneurs increase production" is more of an after-effect for D > S.

Increasing production is a bit like increasing population, but I think the better answer is C.

[Addy]

12 is definently C.
Demand increases supply is most similar to population increases because it's the fundamentally the same thing.
Think of population as "demand", and the supply as "food".

It is not D because if entreprenuers increase production, it means that the supply or "food" is being increased, (meaning, according to the chart, that demand decreases)

[/0]

C is also the obvious answer, if you go right its the first one you come across.