What is/are the main reasons why young children (e.g., five-year-olds) are not as good as adults in recalling information?

What is/are the main reasons why young children (e.g., five-year-olds) are not as good as adults in recalling information? Choose ALL correct answers.

A.   failure in the encoding of information in the sensory store  

B.    weak sensory capabilities  

C.    failure in the short-term memory processing  

D.   inability to retrieve information from the sensory store.