TOEFL Listening: ETS-TOEFL听力机经 - L50WG30OQGL56D61P$

What steps were taken in the 1900s to protect large blue butterflies in the United Kingdom? A. Immature large blues were imported from other parts of Europe B. Conservation areas were established where grazing was limited C. Collecting large blues was banned D. People were encouraged to plant thyme in their gardens