Final answer:
The primary focus of concentrated marketing or niche marketing is to target a specific market segment. It allows businesses to specialize their offerings and marketing efforts to cater to the unique needs and preferences of that segment.
Step-by-step explanation:
The primary focus of concentrated marketing, also known as niche marketing, is C) Focusing on a specific market segment. This strategy involves targeting a narrowly defined customer group who shares specific needs and preferences. Rather than trying to appeal to the entire market, businesses that engage in concentrated marketing tailor their products, services, and marketing efforts to meet the specialized interests of their chosen segment. This allows for more personalized marketing tactics and potentially a stronger market presence within that niche.