upwork seo test answer | Which of the following practices are allowable under Google Webmaster Guidelines?

Which of the following practices are allowable under Google Webmaster Guidelines?
• Using automated programs or services to create links to a site.
• Links with optimized anchor text in articles or press releases distributed on other sites.
• Forum commenting with optimized links in the post or signature.
• Advertising links that use the nofollow attribute. (Answer)