A company's production department was experiencing a high defect rate on the assembly line, which was slowing down production and causing wastage of valuable direct materials. The production manager decided to recruit some highly skilled production workers from another company to bring down the defect rate but was worried that the higher wages of these workers might negatively affect operating income. This decision could produce a(n). O unfavorable direct materials cost variance unfavorable direct labor cost variance O unfavorable direct labor efficiency variance O unfavorable direct materials efficiency variance