What is the main idea of the following sentence from “After Twenty Years”?

And in the door of the hardware store the man who had come a thousand miles to fill an appointment, uncertain almost to absurdity, with the friend of his youth, smoked his cigar and waited.

a. The West is at least a thousand miles from the hardware store.
b. The man from the West waited for his old friend to show up.
c. It is absurd to expect to keep a twenty-year-old appointment.
d. Uncertainty can drive a person to wait too long for an old friend.

Question

What is the main idea of the following sentence from “After Twenty Years”?


And in the door of the hardware store the man who had come a thousand miles to fill an appointment, uncertain almost to absurdity, with the friend of his youth, smoked his cigar and waited.

a. The West is at least a thousand miles from the hardware store. 
b. The man from the West waited for his old friend to show up. 
c. It is absurd to expect to keep a twenty-year-old appointment. 
d. Uncertainty can drive a person to wait too long for an old friend.