Correcting mistakes in pen

What will be the best way to go about this? If for example you want to completely change an answer, will you be able to scratch everything out and write new answer in wherever it fits even , if outside of box?

As for circling, what if you want to change answers? Can you basically just clearly X the wrong answer and circle and point to correct answer?

Is white out permitted?

I don’t know about changing answers in the template if you don’t have room I would probably write answer 7a is on next page. As for the answers put in the lined pages I just put a big X through what you wrote

cross out, move on