Final answer:
The term for interviewing an uninfected person to gather information about a known STD case is 'contact tracing'. Contact tracing aims to identify and notify individuals who may have been exposed for testing and treatment.
Step-by-step explanation:
The correct term for an interview with an uninfected person conducted to gather more information about a known Sexually Transmitted Disease (STD) case is contact tracing (A). This public health tool involves identifying and notifying individuals who may have been exposed to an infectious disease, such as an STD, through close contact with a person who has been diagnosed with the disease. The purpose of contact tracing is to inform these individuals about the exposure so that they can get tested and, if necessary, treated to prevent further spread of the disease.