The joys of owning an ‘OG’ email account 6 years ago
It’s very hung up on making sure the user types the right email address on account registration, having them type it twice, making them provide some sort of security question (before their account is created, mind you!), making sure the question is answered correctly by the person clicking the link, etc etc.
No, it's saying you can do this, this, _or_ this. It's giving you options, not telling you to do everything on it.