听力原文：Google Inc.is trying to establish an online reading room for the New York public

library as well as libraries at four universities -- Harvard, Stanford, Michigan and Oxford in England -- by scanning stacks of hard-to-find books into its widely-used Internet search engine. Scanning books so they can be read through computers isn't new. But Google's latest commitment could have the biggest impact yet, given the breadth of material that the company hopes to put into its search engine, which has become renowned for its processing speed, ease of use and accuracy.

Google's latest efforts to establish an online reading service might have the biggest impact because:

A．it will use a search engine with the fastest speed

B．it will put into its search engine a large number of books hardly available otherwise.

C．it is famous for its search engine which is accurate and easy to use.

D．it will put into its search engine the most extensive materials ever known to have been scanned.