The search engine that makes it easy to find high-quality web resources by combining internet technology with traditional library methods of cataloging and assessing data is known as a(n):

1. abstract index.
2. virtual library.
3. periodical database.
4. digital reference.

Digital reference

Explanation:

An abstract index is a form of service that provide shortened or summarized contents of documents and assign of descriptors for referencing documents.

A virtual library is an online database of text, images, audio, video, or and other digital contents.

A periodical database finds use when you want to find articles on personal topics of interest in magazines, journals, or newspapers.

Digital reference or virtual reference is a service by which a library reference service is conducted online.

c

explanation:

answer; i do believe the correct answer is ( retailing); good luck