Answer :
Specialization makes surplus of goods and services, variety of goods and services and high-quality goods and services possible. It does not make goods available in a short time frame.
The correct answer is "B".
Specialization is the manufacturing focus which represents the opposite to mass production made by economies of scale. While large scale factories produce numerous articles which are standardized in regards to ther design and quality, specialization creates products which usually have a higher quality and are more diversified in regards to their design. Nevertheless, this is achieved at the expense of investing more time than what large scale factories take to produce a standard product.