In a Process Cost System,how Is the Unit Cost Affected

Multiple Choice

In a process cost system,how is the unit cost affected in a production cost report when materials are added in a department subsequent to the first department and the added materials result in additional units?

A) It causes an increase in the preceding department's unit cost that necessitates an adjustment of the transferred-in unit cost.
B) It causes a decrease in the preceding department's unit cost that necessitates an adjustment of the transferred-in unit cost.
C) It causes an increase in the preceding department's unit cost but does not necessitate an adjustment of the transferred-in unit cost.
D) It causes a decrease in the preceding department's unit cost but does not necessitate an adjustment of the transferred-in unit cost.