Which of the Following Is a Difference Between Job Order

Which of the following is a difference between job order costing and process costing systems?

A) Companies that use a process costing system mass-produce identical products while companies that use a job order costing system produce many different types of products.
B) Companies that use a process costing system accumulate product costs throughout the production process while companies that use a job order costing system accumulate product cost only at the end of the production process.
C) Companies that use a process costing system accumulate direct material and direct labor,but not manufacturing overhead while companies that use a job order costing systems accumulate direct material,direct labor and manufacturing overhead.
D) All of these ans choices are differences between process costing and job order costing systems.