Question

if fred wants to use a common search engine which of the following should he pick?

Answer 1

Answer:

Google  

Explanation:

Refseek  is an "academic search engine for students and researchers"; therefore, it will only show academic results.

WorldCat  is a search engine for libraries worldwide - "72,000 libraries in 170 countries".

Dogpile fetches results from other search engines such as Google, Yahoo and Bing.

This would mean that Google is the most versatile for doing anything/all of the above.