Remaining Time: 35 minutes, 22 seconds. Question Completion Status: C. costs will not fluctuate d. assumptions about fixed and variable cost behavior are reasonably valid. QUESTION 18 Which terms will make the following statement true? When manufacturing overhead is under-applied, the manufacturing overhead account has a balance and applied manufacturing overhead is less than manufacturing overhead. O a. debit, actual debit, estimated O c. credit, estimated O d.credit, actual QUESTION 19 Sunk costs usually are relevant when making decisions. True False all answers