If using Google Tag Manager, which of the following sitewide tagging solutions would be used to measure conversions?

–If using Google Tag Manager, which of the following sitewide tagging solutions would be used to measure conversions?– –Add on the conversion linker tag to Google Tag Manager– –Install gtag.js tags– –Link Google Ads and Google Analytics accounts– –Sitewide tagging is already in place, so no action is needed–