In Spite of Their Ease and Power, Conventional Search Engines

Multiple Choice

In spite of their ease and power, conventional search engines have three primary shortcomings: 1. No human editors are involved to evaluate the quality; 2. Various engines use different search techniques, so they often find different material; and 3. ________.

A) There are very few search engines
B) Lack of better editing algorithms
C) Inaccessibility to the hidden Internet
D) Easy accessibility to the deep Internet