The Fourth Revised Edition of the Greek Text of the United Bible Societies is the same as the NA28, and the committee of editors give their preference and rank their preference for each major variant in each verse of the New Testament by preceding it with the letter {A}, {B}, {C}, or {D} with the following explanation,
The letter A indicates that the text is certain.
The letter B indicates that the text is almost certain.
The letter C, however, indicates that the committee had difficulty in deciding which variant to place in the text.
The letter D, which occurs rarely, indicates that the committee had great difficulty in arriving at a decision.
In addition to these two Greek texts, there are critical and exegetical commentaries on the Greek text of each of the individual books of the New Testament. These commentaries discuss all of the major variants, and many of the lesser variants, and the significance of the evidence for each variant. These commentaries are important because, in addition to their many years of higher education, the authors have spent years (sometimes 25 or more) studying the Greek text of the book of the New Testament they are commenting on. These commentaries, especially those written since 1990, often provide very extensive bibliographies that list articles published in peer-reviewed journals on the Bible, including articles on each of the most important variants. Indeed, the most important variants have been very extensively researched and analyzed by scores of scholars who are specialists in their field. There is, however, no shortage of poorly educated men who cannot even read Greek who will tell us that the Majority Text is always right, and that the critical texts are the work of the devil.