What idea based on the eugenics movement reinforced anti-immigration bias in the United States?

Iwant to be an engineer but cant do math for the life of me, but i also want to be a cop. "what should i do"

Iwill be giving 15 points to whoever answers the concept of checks and balances means that each branch of governmenta. has its own powers and responsibilitiesb. is clearly described in articles of the constitutionc. has the ability to correct the other branches in case of an errord. is set up so that in case of constitutional crisis, the governement will continue to operate

Identify one specific example of how the enlightenment characterized a change in economic thought from the past