Olivia didn’t leave the office until everybody had...

Câu hỏi: Olivia didn’t leave the office until everybody had gone home. 

A It was not until everyone had gone home that Olivia left the office.

B It was until everyone had gone home that Olivia didn’t leave the office.

C Not until everyone had gone home that Olivia left the office.

D It was not until everyone had gone home did Olivia leave the office.