Which of the Following Statements Is/are Incorrect

Which of the following statements is/are incorrect?
i.The fuel elements in a nuclear fission reactor are simply long trays that hold fusionable matter in the reactor
ii.The moderator in a nuclear fission reactor governs the reaction rate
iii.The control rods in a nuclear fission reactor slow neutrons

A) i only
B) i and iii
C) ii and iii
D) None is incorrect
E) All are incorrect