I have a long survey (Survey B), and want part of it to be another survey I created (Survey A). I’d like to embed Survey A in Survey B. If I just do a link to A, I won’t have the data as part of Survey B, right? And I’m not sure I can copy and paste Survey A into B either.
If I understand your intentions correctly, you are trying to merge two surveys. Unfortunately there is no easy way to do this. As you develop a survey you are also building the underlying response database, so copy/paste will not work.
Your best option might be to put copies of the pages from Survey A into the QUESTION LIBRARY and then add them to Survey B from the library. You can review the SurveyGizmo documentation for details – https://help.surveygizmo.com/help/question-library