His studies of ice-polished rocks in his

His studies of ice-polished rocks in his Alpine homeland, far outside the range of present-day glaciers, led Louis Agassiz in 1837 to propose the concept of an age in which great ice sheets had existed in now currently temperate areas.

2 Explanations

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Jasleen Ahuja

Hi
The prompt says- his studies...led Louis to propose the concept of an age in which great ice sheets had existed.
Shouldn't we use past perfect here because we already have 'led Louis' which is past?

Feb 13, 2017 • Comment

Adam

Hi Jasleen,

It's clear that the ice sheets existed before Louis, so we don't absolutely need past perfect to clarify this.

If you're stuck between (A) and (B), (A) is clearly wrong because "now currently" is redundant.

Feb 13, 2017 • Reply

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Mike McGarry, Magoosh Tutor