Which of the following requires a switchboard for incoming calls but not for outgoing calls?

Wriglee, Inc. went to court this year and successfully defended its patent from infringe-ment by a competitor. The cost of this defense should be charged to

a. patents and amortized over the legal life of the patent. b. legal fees and amortized over 5 years or less. c. expenses of the period. d. patents and amortized over the remaining useful life of the patent.

The primary key for 1:1 relationship tables

A) is a single attribute. B) always consists of two attributes. C) is the primary key of the most important entity linked to that relationship. D) does not exist. Many-to-many relationship tables only use foreign keys.