Final answer:
The focal point of all marketing efforts is customer satisfaction, which can be achieved through product differentiation.
Step-by-step explanation:
According to your text, the focal point of all marketing efforts is B) Customer satisfaction. This is because marketing strategies, including product differentiation, are designed to meet the needs and preferences of the customer. Product differentiation is any action that firms do to make consumers think their products are different from their competitors'. Differentiation can be based on physical aspects of the product, location, intangible aspects, or perceptions. Nonetheless, the ultimate goal of employing these techniques is to achieve higher customer satisfaction, which is central to successful marketing efforts.