6. Management by exception would dictate that the manager investigate which of the following variances? A) All unfavorable variances B) All favorable and unfavorable variances C) Variances which are the result of costs that are less than budget. D) Variances which are the result of costs that are greater than a budget by an established dollar amount or percentage the 7. A favorable variance causes operating income to be budgeted operating income? A) lower than B) greater than C) equal to D) half as much as