Why was the US constitution changed to protect peoples rights

The Bill of Rights of the US Constitution protects basic freedoms of United States citizens. ... The Bill of Rights protects freedom of speech, freedom of religion, the right to keep and bear arms, the freedom of assembly and the freedom to petition.

Explanation:

no options provided, here,but the answer to this question is often: a historian cites a japanese newspaper article published a year after the end of world war ii in order to draw conclusions about the effect of the war on the japanese economy.

clearly from the answer, the historian alludes to historical sources,and records to aid in analyzing and drawing conclusion on the effect of the war on the economy of japan.

that would be the steamboat because none of the other things are forms of transportation