The checkboxes can not be checked using tabindexing on keyboard

In this challenge:

When I tried to use tab indexing on the HTML preview, I was able to navigate the page and also fill the parts of the form except for the checkboxes. Do the checkbox filling word differently? If so, what is the way to do this?

I tried pressing ENTER while focusing on the checkboxes but it didn’t work.

Expected is:
Add a tabindex attribute to the p tag and set its value to “0” . That means: line 16 in your code should be:

<p tabindex="0"> Instructions: ................</p>