Answer:
b. Overhead Costs
d. Expensed in the period incurred
Explanation:
-Direct material refers to the cost of the material used to manufacture a product.
-Overhead costs are the costs related to the operation of the business and they can't be assigned to a good or service.
-Product Costs are the costs to manufacture a product.
-Expensed in the period incurred are the period costs which are costs not related to the production of a good.
According to these definitions, a service company has the following costs: overhead costs and expensed in the period incurred because these are costs that are not related to the creation of a product.
On the other hand, the other options direct material and product costs are not right because these costs are directly related to products.