Plzz help me i will give brainliest

Questionnaries  are primary source. Case studies are primary source. Interviews are primary source. Government reports are primary source.  Previous research are secondary source. Web article are secondary source . Observations are primary source.

Explanation: Primary sources are the original documents of an event .A secondary source is generally one or more steps removed from the event or time period .

a: social security and social programs