Tamara is writing code as part of a large project. She has just compiled her code and run it, but the result is not exactly as expected. Which of the following strategies would be efficient ways to debug her code so that it works as intended?

a) Print debugging messages in the code.
b) Rewrite the entire code from scratch.
c) Remove all comments to simplify the code.
d) Ignore the issue and proceed with the project.