At first , I spent whole days with him , showing him around , driving him to local sights and antique malls , but starting yesterday , I really needed to attend to personal business , so I left him pretty much on his own , as I will today . I am not sure how long he is staying , but life must go on . The weather has been fantastic these last several days , but as often happens to me when the weather is nice , I can develop some severe sinus headaches . It is a curious contradiction , and very frustrating . I just took something that should help , and now I am going for a long walk to the bank to deposit some checks .

Possible answers: (a). Because the weather is nice. (b). None of the above choices .. (c). Because they are visiting and want to see the local sights. (d). Because they have sinus headaches.
Answer the following question: Why might they have been showing them around ?
(c).