Answer:
The correct answer is letter "B": A listing of components, their descriptions, and the quantities of each required to make one unit of a product.
Explanation:
A Bill of Material (BOM) in Materials Requirement Planning (MRP) relates the final product with the raw materials, assemblies, parts, and components necessary to manufacture a unit of that good. The BOM is a document that itemizes all the resources necessary to produce a good including at the top the product itself and a listing in hierarchical orders from components to individual materials.
Creating an accurate BOM helps to have all the material necessary for production available.