In evaluating three mutually exclusive alternatives by the B/C method, the alternatives were ranked A, B, and C, respectively, in terms of increasing cost, and the following results were obtained for overall B/C ratios: 1.1, 0.9, and 1.3. On the basis of these results, it is correct to:

(a) Select only alternative A

(b) Select only alternative C

(c) Compare A and C incrementally

(d) Select alternatives A and C