Please if you are not sure from your answer 100% do not answer this s question. Thanks in advance

The software development team pushed a new web application into production for the accounting department. Shortly after the application was published, the head of the accounting department informed IT operations that the application was not performing as intended. Which of the following SDLC best practices was missed? Peer code reviews OB Regression testing O C O D Fuzzing O E User acceptance testing Static code analysis