Given the code fragments:What code should you add to the body of the updateEmployee method...

entityManager.merge(emp);

Context. Ctx = new InitialContext();UserTransaction utx = (UserTransaction)ctx.lookup(“java:comp/UserTransaction”);utx.begin();entityManager.merge(emp);utx.commit();С. entityManager.lock(emp);EntityManager.merge(emp);

entityManager.getTransaction().begin();entityManager.merge(emp);entityManager.getTransaction().commit();