Which of the following is true of both nuclear fusion and nuclear fission?

a. They both require a high energy input

b. They both occur without byproducts

c. They both have a high energy output

d. They both involve large atoms breaking into smaller atoms

c

Explanation:

because both nuclear fission or nuclear fission but have high energy since some can be used in producing heavy atoms which can be used for weapon , large mass of weapons and the other used sometimes for medicine for therapies like radioactivity therapy

answer; ///i do believe that the correct answer is (c) hold atoms together to form compound;