What is the true language of argentina ,chile and ecuador

Which of the following contributed most to making the items listed in the box

How would having more railroad tracks be advantageous during a war

What does a most-favored-nation (mfn) status mean? a country pays the same tariffs as those paid by all mfn countries. a country has a special exemption from all tariffs in the united states. a country has special licensing agreements with u.s. corporations. a country is exempt from product standards that make it expensive for goods to be imported.