Examine the following commands and their output: SQL> SELECT ename, sal FROM emp WHERE ename='JAMES'; ENAME SAL JAMES 1050 QL> UPDATE emp SET sal=sal+sal*1.2 WHERE ename='JAMES'; 1 row updated. SQL> SELECT ename, sal FROM emp WHERE ename='JAMES'; ENAME SAL JAMES 2310 View the exhibit and examine the Flashback Version Query that was executed after the preceding commands. What could be the possible cause for the query not displaying any row?（）