In CSI specifications, what is the primary distinction between Quality Assurance (QA) and Quality Control (QC)?
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A
QA is owner-performed; QC is contractor-performed
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B
QA focuses on preventing defects through process oversight; QC focuses on detecting defects through testing
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C
QA applies only to materials; QC applies only to workmanship
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D
QA is required by code; QC is optional