Correct option is C
Dr Johnson's Dictionary of the English Language was published in 1755. It is a landmark work in English lexicography and was the standard English dictionary for over a century. The dictionary was compiled by Samuel Johnson and six assistants over a period of nine years. It contains over 40,000 words and definitions, as well as examples of usage from a wide range of authors. Johnson's dictionary was notable for its precision and comprehensiveness. It was also one of the first dictionaries to include etymologies, which are the origins of words. The dictionary was a critical and commercial success, and it helped to standardize the English language. Johnson's dictionary is still used today by scholars and lexicographers. It is a valuable resource for learning about the history and evolution of the English language.