Answer:
Option D. Are probably not engaged in intense competitive rivalry
Explanation:
The reason is that the two companies are not affecting each others market because of their small size and as a result are not engaged in intense competitive rivalry. It is the characteristic of intense competitive rivalry that the companies involved affect each others pricing, product quality, etc decisions because the companies try to retain of grasp the market share of the other company. So due to the smaller sizes of the firm, it is clear that the two firms are not involved in intense competitive rivalry.