What are two ways to improve the performance?

Universal Containers has five development teams. The performance of the teams has been good, but the number of bugs has been increasing. After each sprint, they need more time to understand the code and make changes.

What are two ways to improve the performance? Choose 2 answers
A . Define a team that will analyze/approve all changes.
B. Define and follow code standards.
C. Sprint review process.
D. Version control system to identify who is generating the bugs.

Answer: B,C