Final answer:
During the late 1960s, the three Chicago supergangs focused on social betterment programs, particularly aimed at combating racism and poverty through community organization and initiating various social programs.
Step-by-step explanation:
The three Chicago supergangs became involved in social betterment programs during the late 1960s, thereby making answer C) the correct choice for this question. Members of movements like the Students for a Democratic Society (SDS) moved into Chicago's uptown district to address issues of racism and poverty through community organization. By initiating the Economic Research and Action Project and creating JOIN (Jobs or Income Now), they aimed to combat urban poverty and enact social change. Their activities also included establishing police review boards to end police brutality and setting up programs like social and recreational clubs for local youth.