A sentence is given with four words marked as (A), (B), (C) and (D). These words may or may not be placed in their places. Four options with different arrangements of these words are given. Mark the option with the correct arrangement as the answer. If there is no change required, mark 'No rearrangement required' as your answer.

Researchers say their extinction (A), from an risk (B) of more than 900 reef sites, shows the findings (C) of analysis (D) of individual coral species is lower than current international assessments.