______ is an approach to linguistics in which mathematical techniques and concepts are applied, often with the aid of a computer.

A．the article was written in August
B．the article was written in September
C．if the current forecast track for hurricane Ivan holds, it will be the third hurricane to strike Florida in August
D．if the current forecast track for hurricane Ivan holds, it will be the third hurricane to strike Florida in September

A．the Russians understood that they needed nurturing from their new American friends
B．the Russians knew Americans will surely help them
C．upsetting the Russians was something the Americans simply were not to do
D．the Americans shouldn’t worry about upsetting the Russians