B. A ruler denying citizens their rights.
Explanation:
According to the Declaration of Independence, a ruler denying citizens their rights justifies open rebellion against a government.
The Declaration of Independence was adopted by the Second Continental Congress and is important in keeping the natural rights of the people. The famous quote "rights of life, liberty and the pursuit of happiness" come from the Declaration of Independence, which is important in keeping the natural rights of the people, along with asserting the idea, "God made all men equal."
Along with natural rights, the Declaration of Independence makes it known that the main job of the government is to uphold and protect these rights. If the government does not do its job properly and their rights are not fulfilled or denied, the people have every right to start a rebellion against the government.
