在Excel中,将某学生各科成绩放在A1:A9单元格中,判断A1单元格中成绩等级的函数正确的是( )。(判断的依据是:成绩大于等于85为优良,大于等于60为及格,否则不及格)
A.
=IF(A1>=85,"优良",IF(A1>=60,"及格",IF(A1<60,"不及格”)))
B.
=IF(A1>=85,"优良",85>A1>=60,"及格",A1<60,"不及格")
C.
=IF(A1>=85,"优良"),IF(A1>=60,"及格"),IF(A1<60,"不及格")
D.
=IF(A1>=85,"优良",IF(A1>=60,"及格","不及格"))