Final answer:
The audience of the sermon is an illustration of the fact that political support from the German nobility aided in the development of the early Protestant community.
Step-by-step explanation:
A historian interpreting the passage would most likely explain that the audience of the sermon is an illustration of the fact that C- political support from the German nobility aided in the development of the early Protestant community.
The passage mentions that many rulers in northern Germany became Lutheran, which indicates their support for the early Protestant community. Additionally, it states that the Protestant German nobility played a role in the religious disputes with their Catholic and Muslim opponents, suggesting their active involvement in the development of the Protestant community.