Why is a high bounce back rate a negative signal of a web page's quality?

Because the search engine must load the SENP again, and this wastes the server's bandwidth.

Because this behavior is an indicator that the website might be engaging in click fraud.

Because this behavior indicates that the hearcher did not like what they saw or find what they were looking for

Because search engine rankings are determined by websites' conversion rate, and a high bounce rate means a low conversion rate