阅读下列短文，然后从各题所给的四个选项(A、B、C、D)中，选出最佳选项。
A
There is one thing that everyone wants more than anything else. Some people try to get it by .making money. They think that when they have enough money to buy such things as houses， farms， and cars， they will have the one thing that everyone wants.
Other people believe that if they know enough they will find this thing. They study all their lives in search of it. Still others think that if they have power， they will find this thing. They keep telling themselves: when I am a boss，I will no longer have to search for this thing.
What is it that everyone wants more than anything else? What is it that all of us keep working and striving for each day? It is happiness.
