Provide the structure for each product (A-C) in the following reaction sequence. 
Definitions:
Purposive Sampling
A non-probability sampling method in which the researcher selects participants based on specific criteria and the purpose of the research.
Double-Blind Technique
A method used in research where neither the participants nor the experimenters know who is receiving a particular treatment, reducing bias.
Conceptual Replications
Replications of studies using different methods or measures to verify the underlying concept or hypothesis.
Random Sample
A subset of individuals chosen from a larger set (population) where each individual has an equal chance of being selected.
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