To make it less expensive to conduct trade between countries
Answer:
Correct answer is Dada.
Explanation:
Duchamp is actually one of the most important representors of this movement, that flourished in Paris during the 1920s. Therefore, this work also can be contributed to this period.
Other two options are not related with Duchamp's work.
Um I pretty sure its Boycott, if not its sanction
Both independence movements (Vietnam and Algeria) was launched and organized a communist or a nationalist’s party to fight in the battle. When the war was successfully ended and gaining their victory they proclaimed their independence and grabbed their democracy that made all the communists united.