What scope would be set for a Custom Dimension that reports membership status for a customer rewards program?

Which default traffic source dimensions does Google Analytics report for each website visitor?

Source and Medium Campaign and Ad Content Campaign and Medium Source and Campaign Download Google Analytics Individual Certification Exam Answers (PDF)

Which reports indicate how website referrals, organic search, and ad campaigns assisted in conversions?

Multi-Channel Funnel reports Goals reports Acquisition reports Ecommerce reports Download Google Analytics Individual Certification Exam Answers (PDF)

Which reports indicate how traffic arrived at a website?

Geo Behavior Demographics All Traffic Download Google Analytics Individual Certification Exam Answers (PDF)