经批准进行的涉外社会调查，应当在调查问卷、表格或者访谈、观察提纲首页显著位置标明并向调查对象说明的事项包括（）。

A.涉外调查许可证编号

B.调查项目的批准机关

C.调查项目的批准文号

D.本调查为义务性调查

E.本调查为调查对象自愿接受的调查

During a project the scope of a product purchased on a cost reimbursable contract has increased．In the contract the fee to cover the contractor's indirect costs and allow a profit is calculated as 20% of the direct costs．What is most likely to be true ？（）

A．The contractor's indirect costs will increase and the customer's payment for them will increase，to

B．The contractor's indirect costs will increase but the eLlstomer's payment for them will not increas

C．Neither the contractor's indirect costs nor the customer's payment for them will increas

D．The contractor's indirect costs will not increase but the customer's payment for them will increas