The correct answer is: A. Direct material + Direct labor + Direct expenses.
Direct material is the material that is an integral part of the finished product and can be easily traced to it. Direct labor is the labor that is directly involved in the production of the finished product. Direct expenses are the expenses that are directly related to the production of the finished product, such as factory rent and utilities.
Indirect material is the material that is not an integral part of the finished product and cannot be easily traced to it. Indirect labor is the labor that is not directly involved in the production of the finished product. Indirect expenses are the expenses that are not directly related to the production of the finished product, such as office rent and utilities.
Therefore, the basic cost is made up of direct material, direct labor, and direct expenses.