Respuesta :
Answer:
A, C, D
Explanation:
The act actually changed and abolished the previous law, the National Origins Formula, so C.
I also think A and D because the act had established a new immigration policy that reunited immigrant families and it also attracted skilled labor to the US, which means that it should involve their reactions to it, like how they felt about it and if they supported it or not.
hope this helps!! :))
pls rate brainliest if it is lol