It would be A.
That hat looks quite good on you.
You would use well to describe an action.
Some examples;
She danced well in the competition.
You speak French very well.
The cake is good.
That sweater looks good on you.
I hope this helped!
1 you have to keep you dogs on a lead when in the garden.
2 it looks like nobody used this room in years.
3 don't let me warn you agin.
4 we need to put the books back they did not tell us to take them home.
5 peter told me he was going to take the package later.
6 me and the employees are thinking about new rules.
Answer: Part A: D They separated into different groups long ago.
Part B: The answer is: "it also seems like they didn't mix much with outside groups until the arrival of Europeans in the seventh century"
Explanation: I took the test hope this helps!