2道简单英语单选题,请高手说明理由

2道简单英语单选题,请高手说明理由
11.— You keep on coughing.What’s the matter?
— Oh,I’ve got a cold.Nothing serious,____.
A.yet
B.indeed
C.though
D.anyway
12、—Excuse me,officer.I can’t find the subway entrance.____
—See those glass doors?Go in and you will see it on your right.
A.Can you help me?
B.Where is it?
C.Show me the way?
D.You are very helpful