An administrator needs to import data into QRadar for a specific use case.

The data that has been provided to the administrator is stored in records that map a key to a value.

Which type of data collection must the administrator create?

A. Reference set

B. Reference map of sets

C. Reference map
D. Reference map of maps

Reference: https://www.ibm.com/support/knowledgecenter/en/SS42VS_7.3.2/com.ibm.qradar.doc/t_qradar_conifig_rul_resp_reference_set.html