ABC manufacturing firm prepares analysis for variable overhead variances. A $8,500 unfavorable flexible-budget variance indicates that ________. Select one: a. the flexible-budget amount exceeded actual variable manufacturing overhead by $8,500 b. the standard variable manufacturing overhead exceeded the flexible-budget amount by $8,500 c. the actual variable manufacturing overhead exceeded the flexible-budget amount by $8,500 d. the flexible-budget amount exceeded standard variable manufacturing overhead by $8,500