Test analysis: This question examines the impact of the implementation of reform and opening up on people's food, clothing, housing and transportation. Reform and opening up have promoted the development of productive forces and improved people's living standards significantly. People's food, clothing, housing and transportation have undergone great changes and made great progress than before. BD expresses the improvement of people's living standards after the reform and opening up, but the key word of this topic is "basic necessities of life". So b is more suitable for the topic.