.
According to the excerpt, photographers in the 1930s often
were hired
O to provide an escape from the hard times people faced.
O to show how government programs blocked real
change
O to show why change was needed to improve people's
lives.
O to explain the spread of lice and diseases.

The belmont principle of beneficence requires that: a. subjects derive individual benefit from study participation.b. potential benefits justify the risks of harm.c. the study makes a significant contribution to generalizable knowledge.d. risks are managed so that they are no > minimal.