All linear programming problems have all of the following properties EXCEPT
a. variables that are all restricted to nonnegative values.
b. a linear objective function that is to be maximized or minimized.
c. alternative optimal solutions.
d. a set of linear constraints.

Instruction active describing list features which statements accurately describe the features of word that are used to create lists? check all that apply. the tab key can be used to create a sublist. the enter key can be used to add an item to a list. the numbering feature allows for the use of letters in a list. the numbering feature can change the numbers to bullets in a list. the multilevel list feature provides options for different levels in a list.