Cost classification is the process of categorizing costs based on:a.Time periodsb.Payment methodsc.Cost behaviord.All of the above

Cost classification is the process of categorizing costs based on different factors. Let's break down the options provided:

a. Time periods: This refers to categorizing costs based on the time period in which they are incurred. For example, costs can be classified as short-term or long-term, depending on when they are expected to be paid.

b. Payment methods: This involves categorizing costs based on the method of payment. For instance, costs can be classified as cash or credit, depending on how they are settled.

c. Cost behavior: This refers to categorizing costs based on their behavior in relation to changes in activity levels. Costs can be classified as fixed, variable, or semi-variable, depending on how they change with changes in production or sales volume.

Therefore, the correct answer is d. All of the above, as cost classification involves categorizing costs based on time periods, payment methods, and cost behavior.