Cancel as a button or a link? Which is best UX practice?

usability - Best practices: Position of cancel button in modals - User Experience Stack Exchange

usability - Best practices: Position of cancel button in modals - User Experience Stack Exchange

Cancel button, reset form or go back? - User Experience Stack Exchange

Should the Cancel button appear first or second? - UX Pickle

Designing for Action: Best Practices for Effective Buttons, Wireframing Academy

Designing A Better Back Button UX — Smashing Magazine

UX Design Practices for Error Screens and Messages — Design4Users

Cancel as a button or a link? Which is best UX practice?, by Karim Maassen

i.stack.imgur.com/RC9lI.png