Write the next sentence in this paragraph:

How to hack gmail
Understand the limitations.
Gmail is an incredibly secure service. The only way you'll be able to " hack " into someone's account is by stealing their password.

Select from: *You will need to make sure that you actually have a password that is valid, or that could slip from someone's system. To be successful, you must be able to, or at least to know. *If your target has two-factor authentication, you'll need their mobile device as well. There is no other way around two-factor authentication. *You must be a " good " user to hack a gmail account. This means to use this service only online. *To hack someone's password, simply click the " hack " button beside the user name. Once prompted, enter your password, then click " confirm.
If your target has two-factor authentication, you'll need their mobile device as well. There is no other way around two-factor authentication.