Here's why:
* Datum is the singular form of the word.
* Data is the plural form of the word.
* To form the possessive, we add an apostrophe and an "s" to the plural form.
Therefore, the correct plural possessive is data's.
Here's why:
* Datum is the singular form of the word.
* Data is the plural form of the word.
* To form the possessive, we add an apostrophe and an "s" to the plural form.
Therefore, the correct plural possessive is data's.