Which describes the braceros?
A. Many were farm workers invited from Mexico by the United States
government
B. They worked for low wages.
C. They faced housing discrimination.
D. All of the above

D

Explanation:

i beleive a. is the only possible answer

genetics is the study of how dna works, the methodologies defining the new recent technologies allow scientist to have a panoramic view of the entire dna landscape, especially how genomes interact with their environment, including off course, factors outside their organisms.

thus is very possible the existence of both scenarios, where populations of isolated individuals have different genetic traits, and share traits related to genetic mutation, due rats can easily travel overseas using human transport channels. so scientists could get a vast number of data, including human interaction, evolution of rodents, health development, spread of infections, development of new organisms, how genomes evolve in different environments and so on.