Can someone please help me with this assignment? reading one! my teacher jam packed us with homework

Ithink d would be correct

The question to your answer is illinois amigo

Why you put last one a? i think is b.

The first immigrants to settle in what is now the united states were the ancient ancestors of modern native americans. the precise routes of those first north american immigrants are disputed, but there is no uncertainty about the fact that every human being on the continent is either a recent immigrant or a descendant of earlier immigrants. since the first immigrants came here from asia more than thirteen thousand years ago, there have been four large and easily recognizable modern waves of immigrants into the united states.