Question

which identifies lillian wald’s contribution to public health?
founded district nursing
standardized public health nursing education
lobbied for passage of social security in 1935
assisted in development of visiting nurse association

Explanation:

Lillian Wald is known for founding district nursing (also related to public health nursing in urban, poor areas) and was involved in the Visiting Nurse Association's development, but her key contribution here is founding district nursing. The other options: standardizing public health nursing education was not her main focus, lobbying for Social Security in 1935 is not her contribution, and while she was involved with the Visiting Nurse Association, founding district nursing is a more defining contribution.

Answer:

A. Founded district nursing