This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to get rollback on wikipedia
Create an account.
You need to be a registered user in order to get rollback.
Read wikipedia's page about vandalism to find out what vandalism is and how you can spot it.

Options:
(1). During your first few days on the site, use the recent changes page to find edits that are vandalism and click " undo " to revert them. You'll become an autoconfirmed user after 4 days and having made at least 10 edits.;
(2). The top 10% of vandalism was ruined by the administrative change process. Instead of writing about your license change if you don't have one, focus on public better.;
(3). You can see the sites you are visiting to see what your rights are in that setting. Write down your keywords so they are easy to remember.;
(4). While not all people are already registered to their own websites (like wikipedia), try to find someone that is. If you live in a rural area where you have the chance to talk to someone, you can look into it.;
The answer is:
(1).