The strategic move that is most likely being implemented by Flavor Bell in this scenario is "rejoinder".
Option: A
Explanation:
Rejoinder is a short answer that is always sharp or funny, or is a legal concept corresponding to a defendant's response to a complainant's complaint. In business firms like Sweet Cream and Flavor Bell, where both have same targeted audience i.e low-calorie ice-cream consuming customers.
In this case the rejoinder is the response which Flavor Bell gave to Sweet Cream by reducing the market price of their respective products to attract more and more customers by decreasing prices and increasing quality. Affordable or pocket friendly ice-creams with low-calorie is on demand so this rejoining process is the part of business.