A.If Int((x)=x And Sqr(x)>=100 Then Print "OK" Else Print "Error" B.If Fix(x)=x And Abs(x)>=100 Then Print"OK"Else Print"Error" C.If Int(x)=x And (x>=100,x<=-100)Then Print"OK"Else Print"Error" D.If Fix(x)=x And x>=100 And x<=-100 Then Print "OK" Else Print "Error"