Questions 16 to 20 are based on the following talk.

A. Having business meetings during breakfast time.
B. Serving breakfasts from silver dishes and a sideboard.
C. Starting a busy day with nourishment and healthy food.
D. Eating breakfast before arriving at the office for a hard day’s work.

一奶牛精神沉郁，食欲下降，不愿站立和走动，反刍停止，泌乳下降，两前肢向前伸出，两后肢伸入腹下。

若强行运步，步样紧张，肌肉震颤，触诊蹄温升高，敲打蹄壁敏感，则该病最可能是（）。

A、白线裂

B、蹄叶炎

C、蹄裂

D、钉伤

E、蹄叉腐烂