The correct answer is C) People everywhere struggle against oppressive governments.
What Thomas Paine meant when he said, "The cause of America" is "the cause of all mankind" was that "People everywhere struggle against oppressive governments."
One of the most prominent thinkers in the times of the American colonies was Thomas Paine. In January 1776, he published the pamphlet called "Common Sense," in which he invited colonists to support independence from Great Britain. In "Common Sense," he expressed ideas such as "The cause of America is the cause of all mankind," meaning that all oppressive people should raise their voice and fight for their liberty.