Good debugging techniques include:

A) Inserting output statements in your program.
B) Tracing variables
C) Using an IDE debugger
D) All of the above

All of the above options, inserting output statements, tracing variables, and using a debugger, are good debugging techniques. Inserting output statements help to see the progress of the program, and tracing variables help to identify which variable is causing errors. On the other hand, using an IDE debugger is an excellent way to get more details and to visually see the program's behavior during runtime. Therefore, the best choice is to use all three debugging techniques - inserting output statements, tracing variables, and using a debugger.