Rank the Following in Ascending Order of an Imposing Small

Essay

Rank the following in ascending order of an imposing small country's welfare. If there are any two that are equivalent, explain their equivalencies.
I. a tariff of t in a small country resulting in imports of M units
II. a quota of M units of imports, with the government auctioning quota licenses to the highest bidders
III. a quota of M units of imports in which domestic firms engage in rent-seeking activities
IV. an arrangement in which the exporting country voluntarily agrees to limit its exports to M units