Which of the following comments describes best practice when building a forecast model in Excel?

Select one:

a) Working with iteration turned off is best because it means Excel will alert the model builder when a formula is circular

b) Working with iteration turned on is best because it means Excel will alert the model builder when a formula is circular

c) The edit directly in cells field should always be turned off Workbook calculation

d) Workbook calculation should always be set to manual