GMAT Sentence Correction (SC) | The Cretaceous-Tertiary extinction event

The Cretaceous-Tertiary extinction event, which occurred approximately 65.5 million years ago, increased the volcanic activity across the earth,to result in a large-scale mass extinction of animal and plant species in a geologically short period of time and deposit a thin band of sedimentation across the earth’s landmass.

A- to result in a large-scale mass extinction of animal and plant species in a geologically short period of time and deposit
B- resulting in extinction of large animal and
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