What are the first nine (I-IX) Army classes of supply?
a) I, II, III, IV, V, VI, VII, VIII, IX
b) A, B, C, D, E, F, G, H, I
c) 1, 2, 3, 4, 5, 6, 7, 8, 9
d) Alpha, Bravo, Charlie, Delta, Echo, Foxtrot, Golf, Hotel, India