Until fairly recently, classroom computers were considered a luxury.
Statements
Used to be ... classroom computers were a luxury.
Now ... educators think that students without training in computer skills will lack the skills necessary to compete in the global marketplace.
However ... schools that emphasize computer technology spend more time teaching computer skills but less time developing students' basic math and reading skills.
Evaluate
Questions that ask us to support a Generalization / Proposition usually describe one specific scenario. The correct answer is safely worded takeaway, whereas trap answers are often too strong.
Our job isn't to judge whether it's good or bad that schools have re-allocated some of their math/reading time to computer time. We're just looking for a safely worded answer that restates that they have made this switch.
Something that used to be considered extraneous is now considered vital, and it seems to have resulted in a re-allocation of teaching time.
Goal
Look for the most provable answer we can derive from what we read.