Which of the following statements is TRUE? Upon fork, the child receives a duplicate copy of the parent's address space. The parent has access to the child's space during its execution.

Upon fork, the child and the parent access the same address space.

Upon fork, the child receives a duplicate copy of the parent's address space. When the child runs, the child only modifies its own address space.

Upon fork, the child receives a duplicate copy of the parent's address space. When the child terminates the address space is merged back into the parent.