It has been reported in recent years that a very large number of seats in the engineering colleges in the country remain vacant at the end of the admission session. Which of the following may be the probable cause of the above effect?

• A. There has been a considerable decrease in hiring of engineering graduates due to economic slow-down in the recent years
• B. Students have always preferred to complete graduation in three years time instead of four years for engineering
• C. The Govt. has recently decided to provide post qualification professional training to all engineering graduates at its own cost
• D. There has always been a very poor success rate among the engineering students