What is NOT true about the building of the Channel

单项选择题

Questions 4 to 7 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions. Now listen to the conversation.

A．A British team started to drill southeast from Dover.
B．A French team started to drill northwest from Sangette.
C．The two teams started drilling in 1988.
D．The two teams met under the channel in December 1990.