Dana Halsey Is Chair of the Purebred Marmoset Society,which Maintains

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Dana Halsey is chair of the Purebred Marmoset Society,which maintains a database of registered purebred marmosets and their breeding history.Each marmoset is uniquely identified by a registration number.Originally,the database was stored on index cards,but recently Dana has been exploring the use of a computerized system.One file in the system will store the name,birth date,and other characteristics of all of the marmosets that have been registered.A second file will contain data that link each marmoset to its male and female parents by means of their serial numbers.The entities described by the first file are:

A) Marmosets
B) Parental relationships
C) Registration numbers
D) Names