— Sorry I'm late. I got stuck in traffic.   

—_________. You're here now. Come in and sit down. [ ]

A. You are welcome

B. That's right

C. I have no idea

D. Never mind

亚当·斯密在发《国富论》中强调了（）

A.人际关系的重要性

B.决策的重要性

C.劳动分工的重要性

D.计划的重要性