Which method is used to edit a function that has been created and inserted into a cell?
a: double-click the cell containing the function, and make amendments to the function within the cell.
b: click the cell containing the function, and click in the formula bar to make amendments to the function.
c: click the cell containing the function, and click on the fx symbol to the left of the formula bar to launch the function arguments dialog box where amendments can be made.
d: all of the above methods can be used to edit a function that has already been inserted into a cell.