根据对话内容排列顺序。
Amy: What are you going to do this weekend?
Sarah: I'm going to go shopping on Saturday morning.
Amy: And then?
Sarah: In the afternoon, I'm going to visit my grandparents. And in the evening I'm going to read books.
Amy: When are you going to the science museum?
Sarah: I'm going to the science museum on Sunday afternoon. Would you go there with me?
Amy: Sure.
( ) Sarah is going to read books.
( ) Sarah and Amy are going to the science museum.
( ) Sarah is going to visit her grandparents.
( ) Sarah is going to go shopping.