Theodore is chair of the Extraordinary Chipmunk Society, which maintains a database of all rare chipmunks within the United States. One table will store the name, birth date, and other characteristics of all of the chipmunks that have been registered. Each chipmunk is uniquely identified by a registration number. A second table will contain data that link each chipmunk to its male and female parents by means of their registration numbers. The primary key in the first table is a) birth date. b) a foreign key in the second table. c) the primary key in the second table. d) name