Corrections.

When a question, an answer or an explanation in this course turns out to be wrong, we fix it and list the change here.

No corrections have been made since launch.

Report a problem

Every answered question in the free practice and in the course has the link "Report a problem with this question". It opens an email to us with the question's number filled in. You can also write to support@cdlgreenlight.com: quote the first words of the question and say what you think is wrong.