For Product Modification to Be Effective, All but Which of the Following

Multiple Choice

For product modification to be effective, all but which of the following conditions must be met?

A) The modification should make the product more consistent with consumers' desires.
B) The product must be modifiable.
C) Consumers must be able to perceive that a modification has been made.
D) Modification should allow the product to provide greater satisfaction.
E) The product must be an appliance.