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。
A Biteof China, the seven-part documentary (纪录片) introduces Chinese food through the geography, history and culture.
A Bite of Chinais fill of &eat pictures of food, from expensive food to local food. The documentary shows Chinese food culture and how to make the delicious food.
How to make dishes is only one part of food culture. The program tries to bring something new by showing more cultural elements (元素) about dishes, such as eating habits, and people's life. For example, one part tells China's history of rice growing. It explains why rice is the main food of the southern Chinese, while the northern ones mainly eat wheat flour (面粉).
And a part about pickles(腌制食品) tells about a woman in Beijing. She returns to her hometown in Jilin and makes pickles for the first time for her lonely mother.
Another part shows happy moments of sons and daughters making New Year cakes after they return home from different cities to celebrate with their lonely parents in Zhejiang.
A Bite of Chinaalso shows social changes when showing food culture. For example, some members of a family work outside but leave the old in their hometowns - in this case, food can make people remember the happy time.