It was only the office phoned mạ that I found out about the meeting.
It was only the office phoned mạ that I found out about the meeting.
A. Not until did the office phone mạ did I find out about the meeting.
B. Not until the office phoned mạ did I find out about the meeting.
C. Only the office phoned mạ did I find out about the meeting.
D. Only after did the office phone mạ that I found out about the meeting.