to generate power, uranium atoms in fuel rods\na are hit by tiny particles so that they split apart\nb are…

to generate power, uranium atoms in fuel rods\na are hit by tiny particles so that they split apart\nb are safe as long as the uranium stays in the rods\nc fuses into lead, which releases energy\nd all of the above

to generate power, uranium atoms in fuel rods\na are hit by tiny particles so that they split apart\nb are safe as long as the uranium stays in the rods\nc fuses into lead, which releases energy\nd all of the above

Answer

Brief Explanations:

In nuclear power generation, uranium - 235 atoms in fuel rods undergo nuclear fission. They are bombarded by neutrons (tiny particles) which cause them to split apart, releasing energy. Uranium in fuel rods is not inherently safe just because it's in the rods as there are risks of leakage etc. Also, uranium does not fuse into lead to release energy; uranium undergoes fission, not fusion to lead.

Answer:

A. Are hit by tiny particles so that they split apart