The classic product$-$centric approach includes some customer involvement to establish product requirements,

$($A$)$ and considers customer needs as part of theproduct development process.

B but leaves most of the customer validation until after the product is released.

$($C$)$ but does not customer needs as part of the product development process.

$($D$)$ and leaves most of the customer validation until just prior to the product release.

none of the above