Troy company budgeted $12 million for customer service costs, but actually spent only$10 miliion. which of the following statements is the best course of action for management to take is this instance? a. management will investigat this $2 million favorable variance to ensure that the cost savings do not reflect skimping on customer service. b. because this $2 million variance is favorable, management does not need to investigate further. c. management will investigate this $2 million unfavorable variance to try to identify and correct the problem. d. management should not investigat every major variance, especially an unfavorable variance.