Power users, computer users who operate demanding applications that require high performance systems, are usually the only users interested in upgrading their computers. The lack of availability of computer upgrade services in most consumer computer dealerships reflects the perception of consumer demand by massmarket computer manufacturers. The availability of upgrade services for all users is limited by the low demand for upgrades by casual users of mass-market consumer computer systems.
Which of the following is an assumption that the passage above uses in drawing its conclusion?
A. Power users are more likely to be able to acquire upgrade services in small local computer service facilities than in large consumer computer dealerships.
B. Upgrade services and upgradeable computers will not become more widespread in the marketplace until high-performance systems become more common.
C. Power users do not generate a demand for upgrade services sufficient to persuade the operators of computer dealerships to cater to their needs.
D. Mass market computer manufacturers are more concerned with designing computer systems that can be produced at a minimal cost than with the ability of those systems to accommodate upgrades.
E. Casual users of mass-market consumer computer systems do not stay abreast of the innovations and options in computer upgradeability.