Final answer:
C. Wright Mills is the sociologist who suggested the connection between society's history and personal biography as part of the sociological imagination.
Step-by-step explanation:
The sociologist responsible for suggesting a connection between a society's history and one's personal biography to explain the sociological imagination was C. Wright Mills. This concept, introduced by Mills, illustrates the capacity to understand how one's own experiences and personal outcomes are shaped by societal and historical context. For example, in examining an individual's decision to marry, one must consider both personal feelings and the socially constructed norms and historical context that influence such a choice.