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What method is cluster?
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a. is the task of grouping a set of objects in such a way that objects in the same group (called a cluster) are more similar (in some sense or another) to each other than to those in other groups
b. a group activity in which learners have a free and relatively unstructured discussion on an assigned topic as a way of generating ideas. It is about a person, group, or situation that has been studied over time.
c. The case study method often involves simply observing what happens to, or reconstructing ‗the case history‗ of a single participant or group of individuals (such as a school class or a specific social group)
d. This teaching style involves a case study format, but the process is not so rigid as a full case study training session
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