c$.$ Choose the variable$($s$)$ that sound like geography.

Fraction of land in tropical area

Whether a country is in East Asia

Whether a country is in Latin America

Whether a country is in Africa

d$.$ The western United States was a Spanish colony until $1849.$ On average, former Spanish colonies have had poor economic performance.

Does the western United States fit that pattern?

No$.$ Favorable geography made these regions able to grow exceptionally quickly.

Yes. Poor institutions and lack of effective regulations have prohibited growth in these areas.

Yes. Western areas of the United States tend to be poorer than the rest of the country due to a lack of resources.

No$.$ Common institutions and prices for factors of production led to rapid convergence with the rest of the United States.