Which search engine offers scholarly resources, including articles and theses, that span countless disciplines? a. google scholar b. bing c. refseek d. academic index?

The search engine bing offers scholarly resources, including articles and theses, that span countless disciplines. Correct B
It is a web search engine owned and operated by Microsoft.  Because it provides a variety of search services, including web, video, image and map search products it is one of the most wanted search engines.

The search engine best used to find scholarly resources would be google scholar. This service is a free and accessible web search engine that references all the text or metadata of educational literature available across many different publishing formats.

Go to settings and or ask google