Speaker: It is amusing to watch some of my friends who can come to a decision tight away, and then some others who can’t. Some people can look at a menu, can pick up a menu and tight away know what they’re going to have for dinner that night. The others will ponder and look at the thing and not be able to reach any kind of decision for a long, long time without some help. I was thinking about this when I was talking to my sister the other day, and I thought about how her children come to decisions very quickly and I was thinking about this and one of the reasons might be that she has given them a great deal of responsibility at a very young age. She has allowed them to make decisions on their own. She takes them shopping many times, and she allows them to choose clothes of their own liking, and I think in a way this teaches a great deal of responsibility. Of course, they consult her sometimes, but many times they are able to decide on something on their own, and I was thinking about my friends and how some of them were not able to make a decision on their own and maybe their parents didn’t allow them to decide their own clothes.

Why does the speaker think her sister’s children come to decisions quickly（）

A. They have taken some drugs.
B. They are more intelligent than adults.
C. They are giving much responsibility.
D. Their decisions are usually worse.