阅读下列短文，从下面每小题的A、B、C、D四个选项中选出最佳选项，并在答题卷上将相应的字母编号涂黑。

    It was a beautiful sunny day in a small village in Africa. I was playing with the children outside. A little boy, about 7 years old, gestured to me to follow him. He had a shy smile on his small face and said something to me.

    "You want me to go to your home?" I asked. He nodded. So we went hand in hand to his home.

    We went to the place where the cabbages were growing. "Piga picha" he said … "Take a picture". Then, I took a photo and showed him the photo on the camera, and he nodded.

    We walked closer to the house and the little boy stood by the coffee tree. There his younger brother was picking coffee berries（咖啡豆）. "Piga picha" he said again. I took a picture quickly for his younger brother.

    He then pulled me by the hand to his mother's grave（墓地）around the back of the house. "Mama Sue," he said almost in tears, "Piga picha." It was my turn to nod. I silently obeyed his simple request. "Piga picha."

    A picture of a little boy at his mother's grave! That reminded me: 40 years ago, when I was 7 years old, I was also standing at my own mother's grave.

    What a day!