You are unable to reach a number on the telephone, but you know that your friend's phone is working fine. You phone the operator and explain:
A) "There's a problem with my phone."
B) "Can you help me, please?"
C) "My friend is always on the Internet."
D) "I'm sure there isn't a problem with my phone."
E) "I can't get through to my friend, but our phones both work perfectly."