vIn 2011, a company selling milk in glass bottles replaced them with new plastic bottles. When they were introduced, the equilibrium quantity on the market fell.
What could be a reason for this fall?
1 )
Consumers preferred the new bottle because it was lighter to carry.
Milk from the farms used to fill the bottle cost more.
3 )
The bottle was cheaper than the existing glass bottle to produce.
4 )
The new bottle was introduced with a successful advertising campaign.
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