Final answer:
Traditional cost accounting systems assume that all costs can be classified as fixed or variable, aiding in cost behavior understanding for short-term decision-making.
Step-by-step explanation:
Identifying a true statement about traditional cost accounting systems, we can acknowledge that traditional cost accounting often assumes that all costs can be classified as fixed or variable. These systems typically do not focus on maximization of systemwide performance, do not involve flexible product costing, and generally do not provide detailed activity information. Instead, they rely on categorizing costs into fixed and variable to simplify the cost allocation process. This simplification facilitates a basic understanding of cost behavior for decision-making, particularly within a short-term context.