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

Dana Halsey is chair of the Purebred Marmoset Society,which maintains a database of registered purebred marmosets and their breeding history.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.Each marmoset is uniquely identified by a registration number.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 second file are:

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