题目内容：
Questions 21—30·Read the article below about decision rights in a company．
·Choose the correct word or phrase to fm each gap from A，B，C，or D．
·For each question 21—30，mark one letter(A，B，C，or D)on your Answer Sheet．
·There is an example at the beginning，(0)．
根据以上资料请回答第21题：_________
参考答案：
答案解析：