单选题 Financial regulation is necessary. It is similar to fire safety rules. In building codes, fire safety rules are mandated by law. There must be ceiling sprinklers, fire extinguishers and fire escapes.
【正确答案】 D
【答案解析】解析：每个分句虽然结构完整，但是断断续续，采用连续简单句型，属于choppy sentence。