Sentences like "Consequently, potential economies of scale are based on the physical and engineering characteristics of the production facilities- that is, on tangible capital-but realized economies of scale are operational and organizational, and depend on knowledge, skills, experience, and teamwork- that is, on organized human capabilities, or intangible capital.", of the first paragraph and "The importance of investing in intangible capital becomes obvious when one looks at what happens in new capital-intensive manufacturing industries." of the second paragraph support option A as the correct answer. Statements through out the passage point out the fact that the primary purpose of the passage is to point out the importance of intangible capital for realizing economies of scale in manufacturing. Thus, option A befits the context better than the other options.