The world needs a new source of energy, an unspillable source.

Choose the three main components of a nuclear fission reactor from the following list: (help again please)?

I am finding all of the answers that are given as choices so I must not be looking at the question correct. Can someone help me out please?

Choose the three main components of a nuclear fission reactor from the following list:

i. The fuel elements
ii. The turbine
iii. The generator
iv. The control rods
v. The moderator
vi. The condenser

a. iii, iv, and v
b. i, ii, and iv
c. ii, iii, and vi
d. iii, iv, and vi
e. i, iv, and v