According to a sample survey of 10,000 people who regularly surf the Internet, one-third of those who admit to feeling irritable and annoyed after going online have reached one third, while 44% of Internet fans under the age of 20 admit to feeling nervous and irritable after going online. Related experts believe There is indeed some kind of "Internet mania. ". According to the above materials, which of the following is the least likely cause of "Internet Mania?". ['Due to the sharp increase in the number of Internet users and congested channels, sometimes you need to wait a long time if you want to access a relatively busy website.', 'Internet users often search for the required information and information without knowing the website address, the probability of success is very small, and sometimes it takes time to get the expected results.', 'Although the use of the Internet is free in some countries, the online payment system is implemented in China, which has restricted the online time of Internet users.', 'A variety of information can be accessed on the Internet, but often too much information will make people confused, lose confidence, and lose personal attention.']