Direct cost assignment for specific cost object is classified as

cost object line cost
cost tracing
cost object indirect cost
cost object staff cost

The correct answer is: A. cost object line cost

A cost object line cost is a cost that can be directly traced to a specific cost object. This means that the cost can be identified with a specific product, service, or activity. For example, the cost of raw materials used to produce a product is a cost object line cost.

Cost tracing is the process of identifying and assigning costs to cost objects. This can be done using a variety of methods, such as direct tracing, indirect tracing, and allocation.

A cost object indirect cost is a cost that cannot be directly traced to a specific cost object. This means that the cost is shared by multiple cost objects. For example, the cost of rent for a factory is a cost object indirect cost.

A cost object staff cost is a cost that is incurred to support the activities of a cost object. This includes costs such as salaries for managers and administrative staff.

In conclusion, the correct answer is: A. cost object line cost.