According to the IUCN Red List categories, which of the following is a quantitative criterion for classifying a taxon as 'Critically Endangered'?

Options:

• A: Population reduction of 30% or more over the last 10 years.
• B: Extent of occurrence estimated to be less than 5,000 square kilometers.
• C: Number of mature individuals is estimated to be less than 10,000.
• D: Probability of extinction in the wild is at least 50% within 10 years or three generations.

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