How does immigration to the United States work against countries such as India and Ethiopia?

The countries can't produce low-priced goods

The countries lose productivity and efficiency

The countries have to raise taxes to pay for immigration

They lose their highly educated citizens to U.S. jobs

I think its B but im not sure

U.S. migration law is complex and there is much disarray with respect to how it functions. The Immigration and Naturalization Act (INA), the assortment of law administering current movement arrangement, accommodates a yearly overall utmost of 675,000 perpetual settlers, with specific exemptions for close relatives. Legal lasting residency enables an outside national to work and live legitimately and for all time in the United States. Legal lasting inhabitants (LPRs) are qualified to apply for almost all occupations (i.e., employments not genuinely limited to U.S. natives) and can stay in the nation regardless of whether they are jobless. Every year the United States additionally concedes noncitizens on a brief premise. Yearly, Congress and the President decide a different number for outcast confirmations.