The costs of direct materials are classified as: Conversion cost Manufacturing cost Prime cost A) Yes Yes Yes B) No No No C) Yes Yes No D) No Yes Yes

D) No Yes Yes

Explanation:

As we know that

The conversion cost includes the direct labor cost and the manufacturing overhead cost

And, the manufacturing cost records the  

= Cost of direct material cost + Direct labor cost + Manufacturing Overhead cost

And, the prime cost includes the direct material cost and the direct labor cost that is directly related to the production process of the product.

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answer; by looking at total product,marginal product,and changes in both after changes in inputs