Can anyone answer this question pls ASAP it’s for physics pls

The process in which the nucleus of an atom splits into two lighter atoms, releasing a large amount of energy is nuclear

When the force acting on an object points at least partially in the direction of the motion the work done is considered to be negative

30 points - when can a theory be modified if a new type of technology allows for new observations that raise new questions? a. immediately, while the questions about the theory are being asked b. after new hypotheses related to the theory are tested in experiments c. only after the new observations disprove all parts of the theory d. while scientists begin to think about how the theory could improve