单项选择题

A.SELECTlast_name,salaryFROMemployessWHEREROWNUM
B.SELECTlast_name,salaryFROMemployessORDERBYsalaryFETCHFIRST3ROWSONLY
C.SELECTlast_name,salaryFROMemployessWHEREROWNUM
D.SELECTlast_name,salaryFROMemployessFETCHFIRST3ROWSONLYORDERBYsalary
E.SELECTlast_name,salaryFROM(SELECT*FROMemployessORDERBYsalary)WHEREROWNUM