Which of the Following Statements About Chain Reactions Is True

Multiple Choice

Which of the following statements about chain reactions is true?

A) The key requirement for a chain reaction is that more neutrons are produced than are absorbed.
B) Three or more neutrons must be released to sustain a chain reaction.
C) Only uranium isotopes are capable of supporting a chain reaction.
D) It is not possible to stop or control a chain reaction once it has been started.
E) A chain reaction will only take place when a critical mass of material has been assembled.