BonJoy Co. applies variable overhead on the basis of direct labor hours. For the month of June, the variable overhead efficiency variance is unfavorable but the variable overhead rate variance is favorable. Which of the following can be concluded from this?

A) The fixed overhead costs were not incurred.

B) The actual variable overhead rate was more than budgeted.

C) The quantity of actual direct labor hours used was more than budgeted.

D) The quantity of actual direct labor hours used was less than budgeted.