The risks of a focused strategy based on either low-cost or differentiation include A. the chance that niche customers will bargain more aggressively for good deals than customers in the overall marketplace. B. the potential for the preferences and needs of niche members to shift over time towards many of the same product attributes and capabilities desired by buyers in the mainstream portion of the market. C. the potential for the segment to be highly vulnerable to international economic cycles and currency exchange rates. D. the potential for segment growth to race beyond the production or service capabilities of incumbent firms. E. the lack of capital to fund massive advertising campaigns.