The correct answer is B. An unlikely leader can fight battles for common folk.
Explanation:
In literature, the word theme refers to a deep message or underlying idea developed during a text and that is usually related to some aspect of life such as love, death or war and that the author wants the audience to understand. Most themes are not stated in an explicit way, but rather developed during a story or text through different elements in it.
In the excerpt presented a character who is Rosa Parks is being described by the narrator, the narrator refers to Rosa as "a warrior for everyman and the every woman" and then describes elements related to a warrior such as using a seamstress as an armor, using a city bus as a tank battle, leading an army of waitresses, street sweepers and using love as a weapon, which shows the main character is somehow a warrior that needs to fight battles for people without being in a real war. This suggests the general or underlying idea (theme) that someone who might not be considered as a leader or warrior can still fight battles to help, support or protect common people or that an unlikely leader can fight battles for common folk.