The best option that describes the competitive industry structure in which Blackberry found itself is:
An oligopoly refers to a small number of companies that exert some significant influence in their relevant industries. All of the firms in an oligopoly are very strong and none of them can ride over the others in the same niche.
Companies who fall under the oligopoly could experience some barriers before they can break into the firm and given their small number, there is a possibility that one can buy the other over. The firms in an oligopoly also tend to depend on each other.
Learn more about an oligopoly here:
https://brainly.com/question/13658628
#SPJ1