Which of the following is a popular search engine? Apple. com
Bing. com
Firefox. com
Microsoft. com

We conclude that Bing is the only option that is correct. Thus, Bing.com is a popular search engine.  

Explanation:

Given the option

From the given option, we can easily determine that Bing is the only popular search engine using which we can carry out web searches. It means we can search for the information in a systematic way based on the input web query we write.

Please note that Bing is a web-based search engine, operated by Microsoft.

All the other options are incorrect.

Apple is a famous technology company; Firefox is an open-source web browser, free to use. and Microsoft is another tech company.

Therefore, we conclude that Bing is the only option that is correct. Thus, Bing.com is a popular search engine.  

answer; i believe the correct answer is (quick access toolbar);