[单选题]下列疾病中属于一类疾病的是（ ）。
A.口蹄疫
B.狂犬病
C.大肠杆菌病
D.布鲁氏菌病
E.禽结核病

Text 4 Picture-taking is a technique both for reflecting the objective world and for expressing the singular self. Photographs depict objective realities that already exist, though only the camera can disclose them. And they depict an individual photographer’s temperament, discovering itself through the camera’s cropping of reality. That is, photography has two directly opposite ideals, in the first, photography is about the world and the photographer is a mere observer who counts for little; but in the second, photography is the instrument of fearlessness, questing subjectivity and the photographer is all. These conflicting ideals arise from uneasiness on the part of both photographers and viewers of photographs toward the aggressive component in "taking" a picture. Accordingly, the ideal of a photographer as observer is attracting because it implicitly denies that picturetaking is an aggressive act. The issue, of course, is not so clear-cut. What ph
A. describing how photographers' individual temperaments are reflected in their work.
B. establishing new technical standards for contemporary photography.
C. analyzing the influence of photographic ideals on picture-taking.
D. explaining how the technical limitations affect photographers' work.