Plural of 'datum'.

**The reasoning** "Datum" is a Latin word meaning "a single piece of information." In Latin, words ending in *-um* form their plural by changing to *-a*. So one **datum** becomes many **data**. This follows the same pattern as: - curriculum → curricula - medium → media - stratum → strata So when you have multiple pieces of information, you're dealing with **data** (the original Latin plural). **Why the wrong options tempt you** **A) datums** – This feels right because we add "-s" to most English words to make them plural (book → books). But "datum" follows Latin rules, not English ones. **C) datae** – This sounds Latin-ish, but it's the wrong Latin ending. That's for feminine words ending in *-a* (like formula → formulae), not neuter words ending in *-um*. **D) datas** – Double trap! You're adding English "-s" to what's already a plural form. It's like saying "childrens." **Quick takeaway** Latin words ending in *-um* swap it for *-a* to go plural: datum → data, just like medium → media.