Question $8(1$ point$)$

The Social Security Office kept records on salary history and age of all U$.$S$.$ citizens $($with social security numbers$).$ The Medicare Office kept health histories and premium information on all U$.$S$.$ citizens and wanted to combine salary information with their records by matching up social security numbers. This data manipulation is known as

A$)$ appending

B$)$ supplementing

C$)$ indexing

D$)$ attaching