Which method should you recommend for each task?

Explanation/Reference:
* When you run an in-place upgrade from Windows SharePoint Services 3.0 to Microsoft SharePoint Foundation 2010, the configuration data for the farm and all the content in the farm is upgraded on the existing hardware, in a fixed order.
* If you are running Microsoft SharePoint Foundation 2010 and have decided that you need the functionality of Microsoft SharePoint Server 2010, you can upgrade from SharePoint Foundation 2010 to SharePoint Server 2010. You can upgrade by using either the in-place or database attach upgrade approaches.
* When you upgrade from SharePoint 2010 Products to SharePoint 2013, you must use a database attach upgrade, which means that you upgrade only the content for your environment and not the configuration settings.