引起妇科和新生儿感染的无乳链球菌属于（）

A.A群链球菌

B.C群链球菌

C.B群链球菌

D.D群链球菌

E.E群链球菌

If a ship station relays a DSC distress call to an appropriate coast station, it means that（）.

A.the ship has received the DSC distress call on a HF frequency

B.the coast station concerned has not acknowledged it within 5 minutes

C.the ship will take command of search and rescue in 5 minutes

D.A and B