Which of the Following Is an Action Which Needs to Be

Which of the following is an action which needs to be performed before using the Goal Seek tool?

A) Creation of a worksheet that includes an objective based on some unknown value in a cell.
B) Creation of dimensions of information by specifying how information is to be summarized by dimension.
C) Definitions of the dimensions of a list by dragging and dropping information labels or column headings into the row and column areas of a pivot table.
D) Entering specific criteria by which a sublist can be created containing only desired information.