Increased competition.
Answer: Option 3.
Explanation:
Free trade is the trade of goods and services from one country to the other country without any boundations and without any restrictions. As a result of the free trade, the consumers have more variety of a particular good in the market.
In this particular case, since Rooby is no longer the only producer of this particular because of the free trade in the market, he can not charge too high for a particular good and it increases the competition between the producers.