The diagram below depicts actual and standard labour rates and hours in a firm with a standard costing system. K N Labour rate L M 0 P S hours The actual labour rate was K per hour and the standard was N. The actual number of labour hours was S and the standard was R. If all variances are adverse, the value of the labour rate variance will De represented by the rectangle. O A. RLMS B. ROPS C. NKLO D. NKMP