Third Party Providers of Publicly Available Datasets Protect the Anonymity

Multiple Choice

Third party providers of publicly available datasets protect the anonymity of the individuals in the data set primarily by

A) asking data users to use the data ethically.
B) leaving in identifiers (e.g., name) , but changing other variables.
C) removing identifiers such as names and social security numbers.
D) letting individuals in the data know their data is being accessed.