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Read the excerpt from Samuel Johnson’s preface to A Dictionary of the English Language. The solution of all difficulties, and the supply of all defects, must be sought in the examples, subjoined to the various senses of each word, and ranged according to the time of their authors. When first I collected these authorities, I was desirous that every quotation should be useful to some other end than the illustration of a word; I therefore extracted from philosophers principles of science; from historians remarkable facts; from chemists complete processes; from divines striking exhortations; and from poets beautiful descriptions. The excerpt suggests that Johnson’s work is significant because it
reflects considerable literary research.
includes colorful drawings and illustrations.
is used by authorities in many fields of study.
explains many scientific principles.

Explanation: in the given excerpt from Samuel Johnson’s preface to "A Dictionary of the English Language" we can see the description of how the author used quotations from philosophers, historians, divines and poets, with the purpose of making each quotation useful to some other end that the illustration of a word. With this information, we can see that the excerpt suggests that Johnson's work is significant because it reflects considerable literary research.