Many adaptations are found in both feathers and wings. Feathers form the soft down of geese and ducks, the showy plumes of ostriches and egrets and the strong flight feathers of eagles and condors. Wings vary from the short, broad ones of chickens, which seldom fly, to the long, slim ones of albatrosses, which spend almost all their lives soaring on air currents. In penguins, wings have been modified into flippers and feathers into a waterproof covering. In kiwis, the wings are almost impossible to detect. 

The word showy in the passage is closest in meaning to:

a) Ornamental 

b) Powerful 

c) Pale 

d) Graceful 

 The answer key says A is the correct one, but D sounds correct as well. What do you think?