Question

in the artistic world, there has long been a tradition of publishing or performing under fictitious names. in 1863, newspaper reporter samuel langhorne clemens began publishing under the pen name mark twain. at the beginning of her acting career, norma jean baker assumed the stage name marilyn monroe. this practice has also been adopted by criminals, politicians, and other public figures. for example, outlaw harry alonzo longabaugh was better known by his pseudonym, the sundance kid.
now, in the digital age, pseudonyms are ubiquitous. most, if not all, internet users have created a username for themselves at some point. these electronic pseudonyms allow users to interact with others without revealing their true identities. some have argued that this sense of anonymity is harmful, since research has shown that people are more likely to be unkind or uncivil when using a fake name. others praise electronic pseudonyms for allowing people to express themselves without fear of retribution. people can more easily criticize those in power or those in the majority when they feel safe from retaliation or punishment.
what is the meaning of ubiquitous as used in the passage?
found everywhere
easily decodable
private
public

Explanation:

The sentence "Most, if not all, Internet users have created a username for themselves at some point" indicates that pseudonyms are very common. "Ubiquitous" means present everywhere or found everywhere. The other options ("easily decodable" - easily able to be decoded; "private" - not public; "public" - related to the public) do not fit the context as well as "found everywhere" does.

Answer:

found everywhere