听力原文： If you must know, we writers are not crazy about the evident power of pictures;

at least, not professionally. I don't know how many times rye looked at Hank Walker's famous shot of the Kennedy brothers. I am moved every time, but I always see the same thing. The attraction, I think, has to do with stillness itself. On display as well are actors, mobsters, kids, kings, animals, bombs, eyes, legs, soldiers, winners, losers, us. These are moving pictures that do not move. That in itself may account for one's fascination with them. We live in a world where everything moves: Families and institutions, no less than trains and boats and planes. The very novelty of the still is like a stage whisper. One pays attention because it is as quiet and noticeable as a mouse. A still picture stands still. Movies say," kook at me, watch this." A still says, "Take it or leave it." The picture, like a selfish lover, stands and waits for others to come to it, secure in the appraisal of its own value. It is not as if the subject is stopped in mid-action; rather, it seems that the still is the action.

What was Hank Walker's profession？

A．A writer.

B．A painter.

C．A photographer.

D．A movie director.