What effect did Nat Turner's Rebellion of 1831 have on southern society?

Question

More whites began hiding fugitive slaves

Many slaveholders freed their slaves.

Open slave revolts increased dramatically****

People stopped discussing rebelling against slavery openly.

Answer 1

I am not at all sure that is true. Check your text.

Answer 2

So it would be D?

Answer 3

Could be, check your text. The others seem unlikely.