You can choose to check more than one alternative and make a selection, called cross tabulation. If the selected alternatives belong to a Single selection or Gradefield these alternatives will be combined by the operation "or" (the example below is the result of a cross tabulating where the participants who have answered that "Alice" or "Sandra" were excellent are considered).
If the alternatives belong to a multiple selection the alternatives will be combined by the operation "and". If there are many questions involved you have to meet all requirements to have the participants´answers presented in the statistics. If you make a selection with those who have answered "Internet" and "Friend", the selection will not be 7 answers (Internet:3 + Friend:5).
Out of this example of cross tabulating there is only one answer in the statistics as there was only one participant who had answered both Internet and Friend.