Question $2(1$ point$)$

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$8.$ There is a CLASS entity where the first attribute CLASS$\_$CODE is used as its entity identifier. The other attributes are CRS$\_$CODE, CLASS$\_$SECTION, CLASS$\_$TIME, ROOM$\_$CODE, PROF$\_$NUM. If a designer would like to include an alternate composite primary key in case CLASS$\_$CODE is deleted, what would be the most appropriate composite primary key?

CRS$\_$CODE

CLASS$\_$SECTION

CRS$\_$CODE and CLASS$\_$SECTION

CLASS$\_$SECTION and CLASS$\_$TIME