Introduced by Italian merchants resident in London during the sixteenth century, in England life insurance remained until the end of the seventeenth century a specialized contract between individual underwriters and their clients, typically being ship owners, overseas merchants, or professional moneylenders. A. in England life insurance remained until the end of the seventeenth century a specialized contract between individual underwriters and their clients, typically being B. in England life insurance had remained until the end of the seventeenth century a specialized contract between individual underwriters with their clients, who typically were C. until the end of the seventeenth century life insurance in England had remained a specialized contract between individual underwriters and their clients, typically D. life insurance in England remained until the end of the seventeenth century a specialized contract between individual underwriters and their clients, typically E. life insurance remained until the end of the seventeenth century in England a specialized contract between individual underwriters with their clients, who typically were 答案是D,毋庸置疑,我想请问题中粗体(typically ship owners, overseas merchants, or professional moneylenders)在句中作什么成分