Why do you suppose ordinary russians came to revolt against the czarist regime in russia?

Ordinary Russians came to revolt against the Czarist regime in Russia for a number of reasons.  Ordinary Russians felt that they were treated unjustly by the Czarist regime, especially in terms of freedom of the press, freedom of assembly, freedom of speech. and freedom in terms of artistic expressions.  Also, ordinary Russians were aware of the regular violations of basic human rights that the Czarist regime was committing.  

The answer is option a. boundary line drawn by pope alexander iv in 1493.