A)He read the cabinet report.
B)He read the newspaper.
C)He listened to a radio report.
D)He's secretary telephoned him.
原文：
W: Mr. Johnson have you heard the morning news report? Mill has resigned his post as Prime Minister.
M: I didn't turn on the radio this morning but I did see the headlines. If you remember
he threatened to leave the office at the last cabinet meeting.
Q: How did Mr. Johnson learn that the Prime Minister has resigned ?