8. Given below are four sentences. While three of them are correct, one is not acceptable in formal English as it is grammatically incorrect. Spot that sentence.
A. Until fairly recently the dominant paradigm in psychology offered virtually no purchase for evolutionary theorising.
B. From David Hume in 1750 to B.F. Skinner in 1950, it was more or less taken for granted that all intelligence is built on one simple mechanism, the associations of ideas.
C. Intelligent minds start as blank slates, and gradually build up a picture of the world from elements associated in our experience.
D. Given this assumption, there was little to say about how evolution might have made people cleverer.