Students Are Given a Series of Items to Memorize

Students are given a series of items to memorize. They can spend as much time on each one as they need to memorize it, but after going on, they cannot go back. Despite spending as much time with each item as they think they need, most get only about half the items correct at the end. What conclusion do these results support?

A) For most verbal items, short-term memory has a greater capacity than long-term memory.
B) Most people cannot accurately judge how well they have learned something.
C) The probability of forming a long-term memory is directly proportional to the time something remains in short-term memory.
D) Massed practice is better than distributed practice for the consolidation of memories.