Which of the Following Phrases Most Aptly Describes the So-Called

Which of the following phrases most aptly describes the so-called Overseas Chinese in Southeast Asia?

A) Chinese soldiers stationed at numerous naval and army bases along the Southeast Asian coastline
B) ethnic Chinese immigrants who have achieved economic success while living in Southeast Asia
C) Asian immigrants to Europe during colonialism who were assumed to be of the same ethnic group
D) Chinese immigrants who form the Southeast Asian underclass working as domestic servants and street cleaners