正项的等差数列{a_n}中，2a₃-a₇²+2a₁₁=0，数列{b_n}是等比数列，且b₇=a₇，则b₆b₈=______．

Software configuration management (SCM) is the task of tracking and controlling changes in the software. Configuration management practices include configuration identification, change control, ( ) and configuration audit.

A. milestones marking

B. status reporting

C. stakeholder management

D. quality audit