The correct answer is B. Doing your research
Explanation:
Before asking questions in a website or writing through customer support it is recommended to first do your research, this means looking for information on the internet or the frequently asked questions because in most cases the question you have in mind has been answered by the webpage or other people and therefore if you look by you own you can avoid sending emails or contacting people. This principle is basic when using the internet and implies only in case you cannot find the answer to a question you ask for help.
According to this, sending an email before looking through the site and reading the frequently asked question is an example of not doing your research, because it is supposed first you look for information on your own and just in case you cannot find anything you contact someone else.
