Which statements correctly describe the origins or major features of the caste system?

About how many european immigrants were processed at the facilities on ellis island

Why did roosevelt support a europe first strategy even though it had been japan that had first attacked the us

Ascientist performs an experiment where she measures the mass of a piece of metal, pours acid onto the metal, washes the metal, and then re-measures the mass of the metal. the scientist repeats the experiment several times, each time increasing the amount of acid used. the dependent variable in the experiment is the: initial mass of the metal final mass of the metal amount of acid used washing the metal