Which of the following website design guidelines have been recommended by Google?

Q) Which of the following website design guidelines have been recommended by Google?

Answers:
• Having a clear hierarchy and text links
• Every page should be reachable from at least one static text link
• If the site map is larger than 100 or so links, you should break the site map into separate pages
• Keeping the links on a given page to a reasonable number (fewer than 100)
• Use less than 30 images or graphics per page