A female meadow vole can produce a fresh litter of about five pups every three weeks if she chooses to breed at maximum speed, butthey begin suppressing pup production from the moment they become concious of nearby voles in excess .
A/ they begin suppressing pup production from the moment they become conscious of nearby voles in excess - Incorrect. Here 'they' does not have a proper antecedent. 'Female meadow vole' is singular.
B/ voles begin suppressing pup production from the moment they become
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A/ they begin suppressing pup production from the moment they become conscious of nearby voles in excess - Incorrect. Here 'they' does not have a proper antecedent. 'Female meadow vole' is singular.
B/ voles begin suppressing pup production from the moment they become
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