Answer:
"Its history should be an enduring tribute"
Explanation:
I just took the test and got it right (it was a post test)
My last answer was deleted for being pointless, but I had to add more letters for the correct, succinct answer to be published. The right answer is "a sentence".
Better because we have less slaves and less racist people and less hate
We know that 'migrate' means to move. So since that, we need to add the -ing, and we know that we end up with the meaning "moving".
So migrating means moving from one place to another.