The paragraph is followed by an incomplete phrase or sentence which summarizes the main idea of the paragraph. Choose the missing words of the phrase or sentence.

The IAEA, the UN nuclear watchdog, warned that the nuclear crisis triggered by Japan's earthquake and tsunami is far from over. The lesson Germany learns from the Japanese nuclear disaster is that the earlier the exit, the better. Germany would turn to green and clean technologies and become a nuclear-free country.
Germany's reflection on nuclear（）