What type of data is collected first-hand from original sources?

Field research involves the collection of data directly from original sources, allowing for firsthand experience and observations. This type of research is crucial for obtaining information that is fresh and specific to the context being studied. By gathering data directly through methods such as interviews, observations, and surveys, field research enables researchers to understand complex situations and acquire insights that secondary data may not provide.

In contrast, secondary data involves the use of data that has already been collected and published by others, which could lead to less specificity regarding the current research context. Case study data focuses on an in-depth investigation of a particular instance or case, which may utilize both primary and secondary sources but is generally more contextual rather than broad data collection. Survey data can be part of field research, but it does not encompass the full scope of what field research entails, as surveys are just one method that may be used within that approach.

Thus, the correct answer clearly identifies field research as the method that collects first-hand data, emphasizing its importance in providing accurate and relevant insights for various business management studies.