Explanation:
This statement updates the control file with the new location of the data file. Incorrect Answer:
2: It does not update the data dictionary.
3: It does not change physical location of the data file: it should be already copied manually on new disk.
4: It ONLY updates the control file with the new location of the data file WITHOUT physical copying of the data file.
Reference:
OCP Oracle 9i Database: Fundamentals II Exam Guide, Rama Velpuri, p. 124-125
Chapter 6: Backup and Recovery Overview

---