Final answer:
A Quaestor in the Roman kingdom served as a tax collector and financial administrator, tasked with the management and oversight of the state's finances. While they may have had ancillary duties related to military logistics, their main role was not as military commanders, religious leaders, or legal advisors.
Step-by-step explanation:
The job of a Quaestor in the Roman kingdom was primarily as a tax collector and financial administrator. This role was crucial in managing the state's finances, including the collection of taxes and the oversight of public funds. Quaestors played a significant part in the financial machinery of the Roman state, working to ensure that revenues flowed into the state treasury and that those funds were properly disbursed for various public expenses and works. Their role can be likened to modern-day financial officers or treasurers within a government's finance ministry.
In addition to their financial duties, Quaestors might also have had responsibilities related to military logistics, such as managing supplies or supporting military commanders, but they were not military commanders themselves. The options given, a) Military commander, c) Religious leader, and d) Legal advisor, were not the primary roles of Quaestors.