Which of the Following Is a Criticism of Standard Costing

Which of the following is a criticism of standard costing, as applied to today's manufacturing environment?

A) Standards tend to be relevant for only a short period of time because of shorter product life cycles.
B) Variance information is usually aggregated (i.e., combined) rather than associated with a particular batch of goods or a specific product line.
C) Traditional standard costing has a fairly narrow orientation, failing to focus on broader issues such as the overall costs of ownership.
D) Standard costing pays considerable attention to labor cost and labor efficiency, which are becoming a relatively unimportant factor of production.
E) All of the answers are correct.