Which one of the following statements about approaches to test estimation is true?
A. A metrics-based approach is based on data gathered from previous projects; an expert-based approach uses the knowledge of the owner of the tasks or experts
B. A metrics-based approach is based on creating a work-breakdown structure first; an expert- based approach is based on input from estimation experts
C. A metrics-based approach is based on data gathered from previous projects; an expert-based approach is based on a work-breakdown structure
D. A metrics-based approach is based on an analysis of the specification documents; an expert- based approach is based on the opinion of the most experienced tester in the organisation
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