Analog signals are superior to digital signals because they don't have to be converted for use by computers and other digital devices

A ________ can divide a two-column section of a document from a one-column section

A) page break indicator B) section break C) nameplate D) line break

Which of the following statements about abstract superclasses is true?

a. abstract superclasses may contain data. b. abstract superclasses may not contain implementations of methods. c. abstract superclasses must declare all methods as abstract. d. abstract superclasses must declare all data members not given values as abstract.