In the diagram, the initial quantity traded was Q and the price was P.
The price then rose to ${P_1}$ and the quantity traded rose to ${Q_1}$.
Which combination of government policy measures could explain this change?

1 )
the removal of a maximum price and the imposition of an income tax on consumers
the removal of a maximum price and the removal of a subsidy to producers
3 )
the removal of a minimum price and the granting of a subsidy to producers
4 )
the removal of a minimum price and the imposition of an indirect tax on the product
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