Read the followingpassage and mark the letter A, B, C or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks.

Since usage of the Internet became widespread in the 1990s, it has (21)________a number of advantages for people. For example, people use the Internet to communicate with others, to find information, to make purchases, and (22)________themselves. Unfortunately, some people use the internet for illegal purpose. Downloading files from the Internet without paying for them is one of (23)________illegal activities people utilize the internet for. The main things that people illegally download are music, movies, TV programs, and books. This internet piracy, as it is called, costs the makers of these products billions of dollars a year. In the past decade, sales of music CDs and movie and TV program DVDs have (24)________ considerably. Many people simply download TV shows and watch them whenever they want. Some TV shows have been cancelled due to the resulting low ratings. Thus far, most (25)________at stopping internet piracy have failed.

D. resulted