Read the passage and answer the following question
The Internet can be reckoned as the discovery of man which has revolutionized his style of working and living. It has totally reduced distance, broken all man-made barriers, and made our world a small place.

The internet revolutionized the computer and the world of communication like never before. The invention of the telegraph, the telephone, the radio, and the computer set the stage for this unprecedented integration of capabilities. The internet has a worldwide broadcasting capability, a mechanism for information dissemination, and a medium for collaboration and interaction between individuals and their computers without regard for geographic location.

The internet has changed much in the two decades since it came into existence. It started as the creation of a small band of dedicated researchers and has grown to be a commercial success with billions of dollars of annual investments. It is changing to accommodate yet another generation of underlying network technologies with different characteristics and requirements from broadband residential access to satellites. New modes of access and new forms of service will spawn new applications, which in turn will drive further evolution of the net itself.

Some of the ways the internet is being used are for finding people, places, or information. One can use the directory services to search the phone books of any country together with zip codes. Businesses and potential businesses research their competition over the internet. College students and their families exchange e-mails to facilitate letter-writing and keep down the cost of phone calls. Students do research with the help of their home computers. Moreover, the latest encyclopedias are available online.

In which domain/domains is the internet beneficial? 

All of the above 

The internet is used in all these domains. Hence, option 4 is the most suitable answer.