有如下Python程序段：

p = "Call-168"

c = " "

for ch in p:

    if ch >= "0" and ch <= "9":

        c += str(9-int(ch))

    elif ch >= "a" and ch <= "z":

        c += chr(ord(ch) - ord("a")+ord("A"))

    else:

        c += ch

print(c)

程序运行后，输出的结果是（   ）

A、cALL-168

B、CALL-168

C、call-168

D、CALL-831