Use of a supertype/subtype relationship is necessary when which of the following exists?
Options: An instance of a subtype participates in a relationship that is unique to that subtype., An instance of a subtype participates in a relationship that is the same as the other subtypes., Attributes apply to all of the instances of an entity type., No attributes apply to any of the instances of an entity type.
. What is the quickest way to select entire worksheet?
Options: a. Choose Edit -> Select all from the Menu
b. Click on the first column, press Ctrl, and then click on the last column
c. Click on the first column, press Shift, and then click on the last column
d. Click on the rectangle box on the upper left corner where column headings and row headings meet