Wikimedia, a Hong Kong licensed corporation, intends to engage an external auditor, Liying Company, to conduct an audit of the Company.Which of the following statements is true? I. Liying Company needs to be responsible to the senior management of Wikipedia Company II.The internal audit team of Wikimedia Corporation must follow the overall arrangement of Liying Corporation for the audit work.Liying will only accept the segregation of duties if it is satisfied that the internal audit staff are competent and independent IV.The recommendations made by Liying shall be reported to the senior management of Wikipedia in a timely manner.
选项：

A:I，III，IV
B:III，IV
C:I，II，III
D:I，II，III，IV