By the result of each set you can see that there was not even a slightest uncertainty of the winner of this match.
Simple, Iran was much better than Bahrain, and absolutely deserved victory and a ticket to the World Championship.
Before Iran, Australia and South Korea have already secured placed in Poland (host of WC) next year. The last participant from Asia will come from group C in which are competing China, India, Saudi Arabia and Chinese Taipei.
To check WoV community profiles od Iran and Bahrain click on these links.