Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Diseconomies of scale most likely result from:
Option A:specialization in the labor force.
Option B:overlap of business functions and product lines.
Option C:discounted prices on resources when buying in larger quantities.

Answer: B