Memory Research Is Easier to Conduct with Children Than with Infants.However,one

Memory research is easier to conduct with children than with infants.However,one potential problem when children participate in memory studies is that

A) they have no measurable working memory.
B) it is extremely difficult to motivate children to participate in research.
C) children's shape perception will not be mature until they are about 8 years old.
D) they may fail to understand the task instructions.