That's definitely the correct answer.
It might have been C: (C. Deal with the 120 data you have already as is) but since it has been deleted we don't know.
If I got 120 rows, where 30 was NULL, I'd throw those 30 away.
That's definitely the correct answer.
It might have been C: (C. Deal with the 120 data you have already as is) but since it has been deleted we don't know.