Furson Corporation makes a single product. In a recent period 8,295 units were made and there was an unfavorable labor efficiency variance of $27,100. Direct labor workers were paid $4 per hour and total wages were $193,000. The labor rate variance was zero. The standard labor-hours per unit of output is closest to:

A. 2.5

B. 5.0

C. 2.0

D. 2.5