In a Classic Study on Memory,the Researcher Showed People 2,560

Multiple Choice

In a classic study on memory,the researcher showed people 2,560 photographs at a rate of one every ten seconds.Each person was then shown 280 pairs of photographs with each pair having an "old" picture (from the first set of photos) and a similar "new" image.The subjects could tell which photograph they had seen before in what percent of the paired photographs?

A) only 5 percent
B) 15 to 25 percent
C) 45 to 55 percent
D) 85 to 95 percent