On False-Belief Problems, Children Who Do Not Yet Have a Complete

On false-belief problems, children who do not yet have a complete understanding of the relation between their own beliefs and others' beliefs:

A) have difficulty understanding that other people could have false beliefs when they themselves know the truth.
B) have difficulty understanding that other people could know the truth when they themselves have false beliefs.
C) believe that others will not be convinced of the truth.
D) believe that others will be difficult to fool.