d) Retrospectives serve as a forum for agile team members to discuss the plan and technical decisions for the next iteration.

b) Retrospectives give testers the opportunity to identify actions that were successful and should be retained after implementing any improvements in the future.

a) Retrospectives allow team members to point out individuals who participated too little in improving quality, as required by the "whole team" approach.

c) Retrospectives are an opportunity for agile team members to provide critical feedback to management and clients without fear of taking responsibility.