Text: When both broad generalizations and in-depth understanding are required, designs that cumulate case studies over a wide number of sites and settings, or that combine case study methods and other methods in one concurrent effort may meet this dual need (U.S.
Entailment: Designs that cumulate case studies over a wide range of sites are good when broad generalizations are required.
Contradiction: Designs that cumulate case studies over a wide range of sites are poor for broad generalizations.