Question

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.

• A. In which great ice sheets had existed in now currently temperate areas
• B. In which great ice sheets existed in what are now temperate areas
• C. When greatice sheets existed where there were areas now temperate
• D. When greatice sheets had existed incurrent temperate areas
• E. When great ice sheets existed in areas no wthat are temperate

Answer 1

The correct option is B In which great ice sheets existed in what are now temperate areas

Here, 'had existed' is incorrect. This is so because the existence of an Ice Age is a universal fact and is not dependent on the proposal of its concept. The use of simple past would be correct here. Also, 'currently' is superfluous when 'now' is already in use. Choice B is the only option that rectifies these errors. The other choice do not do so and hence are the wrong choice. B is the right answer.