Explain the role of the Oxford English Dictionary (OED) as a resource for language-change research.

• A. The OED records word histories, senses and dates of entry, enabling researchers to trace when and how words enter and shift in usage.
• B. The OED prescribes which words are valid in language use.
• C. The OED is updated by crowd-sourced memes only.
• D. The OED focuses exclusively on grammar rules rather than vocabulary.

Answer: (A)

The key idea is that the OED serves as a diachronic record of English, recording word histories, senses, and dates of entry so researchers can trace when a word appeared and how its meaning shifts over time. This is what makes it so valuable for language-change studies: each entry documents first attestations, the different senses a word has had, and the evidence (quotations) showing how usage has evolved. By following the dated senses and examples, you can reconstruct how a word’s meaning broadened, narrowed, or shifted in connotation, and you can see how new senses emerge and old ones fade. This timeline of usage provides concrete material to analyze linguistic change rather than guess about how words might have changed.

The OED isn’t about prescribing which words are valid or about crowd-sourced memes updating entries; it’s a scholarly, evidence-based record of vocabulary and usage across time. It also isn’t focused only on grammar rules; its core function is to document meanings, not prescribe rules.