What was a major outcome of the Revolt of 1857?

What was the main cause of the failure of the revolt of 1857?

Who was the last Mughal emperor at the time of the Revolt of 1857?

The revolt of 1857 at Lucknow was led by :

The Revolt of 1857 was witnessed by the poet –

Which of these was not a reason of failure of 1857 revolt?