The 32 American students chosen as Rhodes scholars for 2015, listed by geographical region: Benjamin D. Sprung-Keyser, Los Angeles, Harvard University Matthew J. Townsend, Chappaqua, N.Y., Yale University Fang Y. Cao, Silver Spring, Md., University of Maryland Maya I. Krishnan, Rockville, Md., Stanford University Sarah M. Bufkin, Atlanta, University of North Carolina at Chapel Hill Ridwan Y.