Describe the shape of the monopolistically competitive firm's demand curve

The supply of a renewable resource is perfectly elastic

Indicate whether the statement is true or false

Presumably, since the United States is a large country in many of its international markets, a positive optimum tariff exists for this country

It follows therefore that when any legislator or government official who promotes zero-tariff free trade policies, is by definition not acting in the public's best interest. Discuss.