1.16以下代码段，试判断假设输入分数为75时，给出的分数等级为:()
score =eval(input("请输入你的成绩:"))
if score >= 60:
grade ="D"
elif score >= 70:
grade ="C"
elif score >= 80:
grade ="B"
elif score >= 90:
grade ="A"
print("输入成绩属于级别t".format(grade))

A.A
B.B
C.C
D.D