Here are the correct answers for each picture based on the options provided:

1. **A. banh chung** (The image depicts a traditional Vietnamese rice cake wrapped in leaves, which is "banh chung.")

2. **D. plants** (The image shows potted plants, indicating "plants.")

3. **C. cleaning house** (The image depicts a person doing household chores, which corresponds to "cleaning house.")

4. **A. visiting grandparents** (The image shows children with their grandparents, indicating "visiting grandparents.")

5. **C. peach blossom** (The image shows flowers that are commonly associated with the peach blossom during Tet in Vietnam, so "peach blossom" is the correct choice.)

In summary:
1. A
2. D
3. C
4. A
5. C