Final answer:
The 'Bill of Rights' in U.S. history signifies the initial ten amendments to the Constitution, designed to protect individual liberties from federal government overreach.
Thus, the correct option is B.
Step-by-step explanation:
The term 'Bill of Rights' in the context of United States history refers to the first ten amendments to the Constitution that protect individual freedoms. These rights include a range of guarantees such as the freedom of speech, religion, press, assembly, and petition, the right to keep and bear arms, protections against unreasonable searches and seizures, and the rights to a fair trial, to name a few. The aim of the Bill of Rights was to ensure the federal government does not encroach on the rights of the citizens and addresses concerns of people who were wary of a powerful central government post-independence. The correct definition for the Bill of Rights is the first ten amendments to the Constitution that protect individual freedoms, making option A the correct match.