Producers of video games are keen on

Read the following passage and mark the letter A, B, C, or D on your an swer sheet to indicate the correct answer to each of the questions from 30 to 34. 
The habits of those who constantly play video games are very im portant to people working in video-game industry. If video games are going to be one of the most attractive features of future interactive 
systems, it is essential for producers to know what types of games to make, how best to present such 
games on interactive video, and how to ensure that such games m aintain their fascination for people. 
Above all, it is vital to build up detailed profiles of people who are addicted to video games. 
Until recently, the chief market for video games has been boys aged eight to fifteen. The fascination 
for interactive video games is seen in its purest form in this  group. Video games appeal to some deep 
instinct in boys who find it impossible to tear themselves from them. Schoolwork is ignored, health is 
damaged and even eating habits are affected. Girls of the same age, however, are entirely different, 
demonstrating far greater free dom from the hold of video games. Quite simply, they can take video games 
in their stride, being able to play them when they want and the n leave them alone. 

Producers of video games are keen on __________.  

• A. finding the best ways of continuing to attract people 
• B. developing computer techniques in making such games 
• C. learning about drug to whi ch people are addicted  
• D. designing ways