Handley Manufacturing Company has prepared the following flexible budget for August and is in the process of interpreting the variances. F denotes a favorable variance and U denotes an unfavorable variance. Flexible Variances Budget Price Efficiency Material A $43,000 $1,300F $3,000U Material B 67,000 500U 1,400F Direct manufacturing labor 80,000 3000 2,800F The most likely explanation of the above direct manufacturing labor variances is that O A. the average wage rate paid to employees was less than expected OB. management may have a problem with budget slack and might be using lax standards for both labor-wage rates and expected efficiency OC. the company may have assigned more experienced employees this month than originally planned O D. employees did not work as efficiently as expected to accomplish the job