what sororities are at usc?
['Alpha Chi Omega - ΑΧΩ Ratings: 441. Grade: 69.56%', 'Alpha Delta Pi - ΑΔΠ Ratings: 412. Grade: 71.06%', 'Alpha Gamma Delta - ΑΓΔ Ratings: 284. Grade: 72.85%', 'Alpha Kappa Alpha - ΑΚΑ Ratings: 21. ... ', 'Alpha Omicron Pi. Ratings: 37. ... ', 'Alpha Phi - ΑΦ Ratings: 529. ... ', 'Delta Delta Delta - ΔΔΔ Ratings: 404. ... ', 'Delta Gamma - ΔΓ Ratings: 563.']