What organization consists of 26 sororities that collaborate to advance the Greek community?

The correct answer, which identifies the organization consisting of 26 sororities working together to enhance the Greek community, is the National Panhellenic Conference (NPC). The NPC serves as a collective body for these sororities, facilitating cooperation and collaboration among its members to promote ethical standards, enhance the collegiate experience, and support the success of women in the fraternity and sorority community.

While the National Pan-Hellenic Council (NPHC) is another important organization that represents historically Black sororities and fraternities, it encompasses a different group focused on cultural and community advancement. The Student Government Association (SGA) functions at individual schools to represent the student body, and the Interfraternity Council (IFC) primarily represents men's fraternities. Both SGA and IFC do not specifically focus on the collaboration of sororities, making NPC the most relevant answer for the context of the sorority organizations.