Question

which search engine is powered by both google and bing? choose the answer.
google
yahoo!
duckduckgo
bing

Explanation:

Yahoo! used to use Google's search results in the past and later switched to Bing - powered search results. So it has had connections with both Google and Bing in terms of its search - powering sources. Google is powered by its own search technology, DuckDuckGo has its own independent search infrastructure, and Bing is Microsoft's search engine powered by Microsoft's own systems.

Answer:

B. Yahoo!