George Sperling was able to differentiate between the amount of information that could be stored in sensory memory and the time until the memory faded by cuing participants to recallA) an entire visual scene from memory. B) a row of letters in a visual array. C) the first letters of words in a visual array. D) the second of three sentences in a visual array

B) a row of letters in a visual array

Explanation:

The experiment conducted by Sperling was intended to proof the existence of Visual sensory memory and to find out whether this memory have a certain set of duration or capacity between individuals.

In the experiment, He made the subjects to look at a computer and the screen will briefly show a row of letters to the subjects.  The result show that  The subjects could see the letters and recall them, proving the existence of visual memory. But the duration of this memory is so short since most subjects only capably to remember those letters for a couple of minutes.