Need help solving this. the answer i picked was incorrect, please please dont pick that as your final answer

This refers to copy-on-write. Given the following figure, where process B is the child process of process A, determine what happens when process A changs page X. The shared page X is updated in the main memory Operating system raises an error since a shared page is being updated A copy of page X is created so A and B can have their own copies None of the above