Which of the following documents established freedom of speech, trial by jury, and the right to bear arms for american citizens?

The correct answer is the Bill of Rights.

The Bill of Rights consists of the first ten amendments to the US Constitution. These rights were implemented in order to secure enough votes for ratification of the new US Constitution. The aforementioned rights are seen throughout this document, as the freedom of speech is guaranteed by the first amendment, the right to bear arms is guaranteed by the second amendment, and a trial by jury is protected by the sixth amendment.