Which of the following should occur at each stage of the SDLC?

Added functionality typically occurs during the development stages, not necessarily at *each* stage like planning or testing.

Management review occurs at key milestones, but verification and validation are continuous technical activities throughout all stages.

Verification confirms that the product is built correctly according to specifications, while validation ensures that the product meets user needs and requirements. Applying these processes iteratively at each stage helps to identify and correct defects early, reducing overall development cost and risk.

Repurposing components is a design or development consideration, not a universal activity for *each* stage of the SDLC, such as testing or deployment.