I'm taking a test and have to guess the right answer to the question after the article. Article: Choose the best answer (,) I put my carry-on in the luggage compartment , and sat down in my seat.Just before take-off,a line of soldiers came down the aisle and filled all the empty seats. After flying for about an hour,an announcement was made that sack lunch were available for $5.As I reached for my wallet to buy one,I overheard the soldier ask his buddy if he planned to buy lunch."No ,that seems like a lot of money for just a sack lunch.I'll wait till we get to Chicago."His friend agreed. I looked around at the other soldiers.None were buying lunch.I walked to the back of the plane,and handed the flight attendant a $50 bill." Take a lunch to all those soldiers." After we finished eating. I went again to the back of the plane,heading for the restroom.A man stopped me."I saw what you did.I want to be part of it.Here,take this."He handed me $25. Soon after I returned to my seat,I saw the Flight Captain coming down the aisle. When he got to my row,he stopped and said,"I want to shake your hand.I was a soldier and I was a military pilot.Once,someone bought me a lunch. It was an act of kindness I never forgot."I was embarrassed when applause was heard from all of the passengers. Later I walked to the front of the plane so I could stretch my legs.A man who was seated about six rows in front of me reached out his hand,wanting to shake mine.He left another $25 in my hand. We landed in Chicago,I picked up my belongings.Waiting just inside the airplane door was a man who stopped me and put something in my shirt pocket.Another $25. Upon entering the terminal ,I saw the soldiers gathering for their trip to their base.I walked over to them and handed them $75."It will take you some time to reach the base.It will be about time for a sandwich.God Bless You."I said. These soldiers were giving their all for our country.I could only give them a couple of meals.It seemed so little. Question: The article is mainly about "." Options: A: Love for one's motherland is often rewarded B: You should show pity to people around you C: An act of kindness will invite others to join in D: Sometimes it costs a little to help people in need
The answer to this question is:
C