Which of the following is true?

Per fission of uranium, 2.5 neutrons are released averagely. Fast neutrons are more likely to cause a fission reaction than a slow neutron. Slow neutrons tend to escape during the fission reaction. All of the above.

Per fission of uranium, 2.5 neutrons are released averagely.

Slow neutrons are more likely to cause a fission reaction than a slow neutron. Fast neutrons tend to escape during the fission reaction instead of causing another reaction.