【名词&注释】
撤销权(right of revocation)、保险合同(insurance contract)、权利义务(rights and obligations)、不安抗辩权(unsafe right of defense)、债务人(debtor)、履行合同(perform a contract)、债权人代位权的行使、行使代位权(exercise his subrogation)、代位权行使(performing of subrogation right)、后履行抗辩权(defense of later performance)
[单选题]下列有关合同履行中行使代位权(exercise his subrogation)的说法,正确的是()。
A. 债权人必须以债务人的名义行使代位权(exercise his subrogation)
B. 债权人代位权的行使必须取得债务人的同意
C. 代位权行使(performing of subrogation right)的费用由债权人自行承担
D. 债权人代位权的行使必须通过诉讼程序,且范围以债权为限