Numerous studies have shown that the income levels of working adults who were students of average academic ability often surpassthe income levels of those adults who were once students of exceptional academic abilities .
A. the income levels of those adults who were once students of exceptional academic abilities – the two groups are not structurally parallel; usage of once is redundant
B. those of adults who had been exceptionally able students academically – parallelism issue ; usage of
...
A. the income levels of those adults who were once students of exceptional academic abilities – the two groups are not structurally parallel; usage of once is redundant
B. those of adults who had been exceptionally able students academically – parallelism issue ; usage of
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