The best explanation among the provided options for why the influence of the U.S. Constitution and Bill of Rights has lessened in recent decades is:
The U.S. Bill of Rights, while revolutionary when it was written, increasingly seems too limited in comparison to newer rights documents.
This option highlights the perception that newer frameworks and human rights documents may address a broader array of rights and issues, leading to a comparative evaluation that might diminish the contemporary regard for the Bill of Rights.