The sales department has requested the report author to build a report which combines a list with a chart. The list must contain product lines and the chart should show details for each product line. The report author decided to use a Master detail relationship to build this report.
Which statement about Master detail relationships is true?
Master detail relationships in reports require the master and detail queries to be nested in frames to ensure the contextual relationship is maintained and the correct results are produced. This nesting allows the details corresponding to each master record to be displayed accurately.
C) is correct https://www.ibm.com/support/knowledgecenter/SSEP7J_11.1.0/com.ibm.swg.ba.cognos.ug_cr_rptstd.doc/t_cr_rptstd_modrep_create_master_detail_relationship.html