Final answer:
The marketplace is most likely to experience high b) intensity of rivalry among competitors.
Step-by-step explanation:
The marketplace described in the question is most likely to experience high intensity of rivalry among competitors.
In an industry with many equally balanced competitors selling products that lack differentiation, there is intense competition among these firms. Each competitor is vying for the same customer base and market share, leading to aggressive pricing strategies, marketing campaigns, and other competitive tactics.
For example, in the slow-growing airline industry, if multiple airlines offer similar routes, flight frequencies, and services, they will compete fiercely to attract passengers. This competition can result in price wars, discounts, and other competitive strategies to differentiate themselves from their rivals and gain a larger market share.