A. THERE HAS BEEN ONLY ONE MASSTHICHTIENGANH.COMB. EXTINCTION OF SP...

76. - DAP AN VA DE THI HOC SINH GIOI MON ANH VAN LOP 10 SO GD DT DAK NONG
DAP AN VA DE THI HOC SINH GIOI MON ANH VAN LOP 10 SO GD DT DAK NONG

76.

A. There has been only one mass

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B. Extinction of species has occurred from time to t

C. Extinctions on Earth have generally been massive.

D. Dinosaurs became extinct much earlier than scientists originally believed.