Planned Obsolescence and Perceived Obsolescence Might Involve All of the Following

Planned obsolescence and perceived obsolescence might involve all of the following EXCEPT .

A) producers continually changing consumer styles
B) the holding back of attractive functional features,then introducing them later to make older models obsolete
C) the use of materials that will rust sooner than they should
D) the use of components that will break soon after purchase
E) the use of unsafe materials