Answer:
Correct answer is A) a shared culture .
Step-by-step explanation:
A is the correct answer as most of the people in Latin America are sharing the same cultural background as most of them were colonies of Spain and Brazil, a Portuguese colony. There is also a strong influence of Catholic church.
B is not correct answer, as they are using different currencies. For example peso is in Peru and real in Brazil.
C is not correct as they don't have unified trade corridor, as it also applies for D because boundaries are not connecting but dividing these countries.