Which of the following are descriptions of New Zealand's progressive ideas that they are known for?
A. They are becoming a "green" country with clean energy and farming practices
B. They have implemented a system of feudalism on the North and South Islands
C. Their Indigenous people are currently not allowed to own property
D. They have an official two-language policy nationwide for the use of both English and French
E. They are a nuclear-free zone
F. They have a fully-developed welfare system with universal healthcare