24 Why does the author mention water and BMW in line 2 and line 4 ?
(A) To contrast the price of daily necessities and luxury products.
(B) To explain why we need to manage money wisely.
(C) To show that the true value of things is determined by the circumstances.
(D) To give examples of expensive and valuable things in daily life.

Money is an important part of life, and one should learn to manage it wisely明智的；穩妥的. However, it isn’t everything. In a barren desert, a bottle of water is more valuable than a bag of gold, which is actually aburden because of its weight. On a date, a scooter can be more valuable than a BMW because a girlholding tightly to her date on the back of a scooter can have a closer bonding親密關係形成 experience than a girlsitting in the passenger seat of a car. Most of the time, the necessity of money has been greatly exaggerated誇張；誇大 by the society. The value of money depends on信任、依靠、需要 the situation. It can be totally useless in one case and incomparably無與倫比的 influential有影響力 in another. The only unchangeable truth is that its utility公共設施、有用、實用 increases增大；增加；增強 when we share it—life is generous慷慨、仁慈的、大量的；豐富 to us when we are generous to others. We can all become masters of money if we put ourselves in the right frame邊界、結構 of mind. When we are poor, we shall ask ourselves, “Why?” There must be a reason. When we see the rich, we should become inspired: What can we learn from them? When we are with the rich, our hearts should be at peace. Be happy for them, and be thankful for your own blessings. When we are rich, a frugal節儉的；樸素、廉價的 yet generous life is the true sign of good character. Some pinch pennies精打細算；省吃儉用 because they have to, but a wealthy person who wastes nothing and lives a frugal節儉的；樸素、廉價的 life is truly someone to be admired. 

Why does the author mention water and BMW in line 2 and line 4 ? 
(A) To contrast相比 the price of daily necessities and luxury products. 
(B) To explain why we need to manage money wisely. 
(C) To show that the true value of things is determined by the circumstances條件，情況、命運. 
(D) To give examples of expensive and valuable things in daily life