Which decision did the United States make about the Kyoto Protocol? The treaty should be signed by all other nations first.

The U.S. delegation walked out of the conference in protest.

The U.S. delegation signed it, but it was never submitted to the Senate for approval.

The U.S. Senate approved the protocol with a nearly unanimous vote.

The U.S. delegation signed it, but it was never submitted to the Senate for approval.

Explanation:

The rise and spread of nationalism gave people a new sense of identity and also led to an increased sense of competition among nation-states. After Napoleon was defeated (twice!) ... It was an extremely bloody competition that we now call World War I.