Who coined the specific epithet 'langevinii' for the Fagus species and why?

A. Manchester and Dillhoff, to honor the location of the fossil discovery
B. Pigg and Wehr, to honor the year of the fossil discovery
C. Manchester and Dillhoff, to honor David Langevin for his dedication to the collection and study of McAbee fossils
D. Gandolfo, to honor the location of the fossil discovery
Answer: 