Which of the following shows the general intonation pattern of a coordinate sentence？（）

A.You train the troops for six months↗and you send them ↘abroad.
B.You train the troops for six months↗and you send them↗abroad.
C.You train the troops for six months ↘and you send them ↗abroad.
D.You train the troops for six months ↘and you send them↘abroad.