To ensure that search engines understand the content on your page, you should:

To ensure that search engines understand the content on your page, you should:
  A)  Repeat your primary keyword throughout the page content using the same wording and phrasing.
  B)  Not use your primary keyword at all – there?s no need, because search engines understand intent.
  C)  Use natural language and variations of your primary keyword phrase throughout the page content.
  D)  Include your primary keyword throughout the page content as many times as possible.