Answer:
The correct answer is letter "C": match the competitors ad campaign but with lower prices.
Explanation:
If it is confirmed that the number of breakfast customers of the fast-food chain restaurant has dropped because of its competitor's implementation of a "good-to-go" breakfast menu, the fast-food chain restaurant should strike back with a similar sale strategy for the breakfast menu but reducing the prices without falling into predatory pricing. The restaurant should also find out a way of improving the current service its competitor is providing to engage the consumers.