You are a lead developer for your company. You are responsible for a managed application with an existing codebase.
Customers report that the software is unstable. Management wants you to lead an effort to add unit testing to the application.
You need to identify the part of the application that will benefit most from adding unit tests. The goal is to achieve better software quality for the most users.
Which section of code should you target? More than one answer choice may achieve the goal. Select the BEST answer.
A. code that has remained unchanged for years
B. code that is complicated but rarely executed
C. code that was recently added to the project
D. code to which many bug reports have been traced
