What is the best practice for testing code to pinpoint a logic error within a script?

What is the best practice for testing code to pinpoint a logic error within a script?
A . Test the code in the W3C code validator.
B . Conduct a manual, line-by-line, code review.
C . Check for console errors when loading the page.
D . Insert watchpoints and comment out code blocks.

View Answer

Answer: D