Question

which procedure will most increase the energy output of a nuclear reactor? exposing the core to the outside world removing fissile material from the core decreasing the amount of steam produced raising the control rods out of the reactor

Explanation:

Control rods in a nuclear reactor absorb neutrons. Raising them out of the reactor reduces neutron - absorption, allowing more fission reactions to occur and increasing energy output. Exposing the core to the outside world is dangerous and not a standard way to increase output. Removing fissile material and decreasing steam production would reduce energy output.

Answer:

raising the control rods out of the reactor