Final answer:
Paul and Barnabas generally preached first to the Jewish community when they first entered a city.
Step-by-step explanation:
The subject of this question is History as it pertains to the early Christian missionaries Paul and Barnabas.
When Paul and Barnabas first entered a city, they generally preached first to the Jewish community. This was because Paul himself was a former Jew and his initial mission was primarily focused on spreading Christianity among Jews.
By starting with the Jewish community, Paul and Barnabas hoped to gain support and followers among the Jews who were already familiar with monotheism and the concept of a messiah.