Mr.Smith is near-sighted.One day he is walking in the street

Mr.Smith is near-sighted.One day he is walking in the street.A strong wind blows his cap off his head.Mr.Smith begins to run after it.An old woman speaks to him from a window nearby.
Hey!What are you doing?”
Running after my cap!”
Your cap?That’s our black cat you are after.”
（ Why does Mr.Smith run after the cat?.
A． Because his cap likes the cat.
B． Because he wants to catch it.
C． Because the cat is the same colour as the cap.
D． Because he thinks the cat is his cap.
对了才奖励.
少了个括号。

D 问题是“他为什么追这只猫” 根据文意他根本不知道这是一只猫,他以为那是他被风吹掉的帽子.