The most widely used operating systems on larger servers is one of the many versions of ____.?

Which statement best describes the relationship between superclass and subclass types?

a. A subclass reference cannot be assigned to a superclass variable and a superclass reference cannot be assigned to a subclass variable. b. A subclass reference can be assigned to a superclass variable and a superclass reference can be assigned to a subclass variable. c. A superclass reference can be assigned to a subclass variable, but a subclass reference cannot be assigned to a superclass variable. d. A subclass reference can be assigned to a superclass variable, but a superclass reference cannot be assigned to a subclass variable.

The _________ Wizard can help you save the steps you took to import or export data. A. Import or Export B. Save steps C. Data Transfer D. Database Access

Fill in the blank(s) with the appropriate word(s).