Which of the following is true about first-party tracking cookies? They save user preferences on a site The track user behaviour across the internet They are what lets marketers use remarketing in advertising They're basically harmless They improve user experience They are controversial and the cause of much discussion Which of the following is not true of a "session" in Google Analytics: the length of a session is fixed by Google and should never be changed it is maintained by new page views O it is maintained by events by default, it expires after 30 minutes all of these are true of sessions