ABC company has a very old web application that was built on Servlets, JSP and a simple proprietary MVC framework which they must use. This application is mostly used for reporting purposes and retrieves data from DB2 through JDBC. They are planning to enhance the functionality of the application and also deploy on a Java EE application server. They approached you for suggestions to improve the application code. Which of the following would not be a valid recommendation (best-fit)? Choose one answer.