A: This statement is correct. It orders the employees by salary and fetches the first 3 rows.
B: This statement has a typo with "FETCE" and "RONS" which should be "FETCH" and "ROWS". Hence, it will not execute successfully.
C: This statement will not execute successfully due to syntactical errors and incorrect use of the ORDER BY clause.
D: This statement is correct. It uses a subquery to order employees by salary and then limits the results to the first 3 using the ROWNUM pseudo-column.
E: This statement will not execute successfully because ROWNUM is evaluated before the ORDER BY clause, so it would return the first 3 rows based on the table's natural order, not the lowest salaries.
The behavior of ROWNUM and the FETCH FIRST syntax are explained in the Oracle Database SQL Language Reference 12c.