Which of the following statements about “internal narrator” is/are true?

A、Thestory-worldofcharactersandeventsisfilteredthroughthenarrator’sconsciousnessalone.
B、TheNarratorcanbethecentralcharacteror awitnesstowhathappenstothecentralcharacter.
C、Thenarratorcangointothemindofothercharactersfreelyanddescribehowtheythinkandfeeldirectly.
D、FrequentlyitiscalledtheFirst-PersonNarratorbecausethestoryistoldbyacharacterwhouses“I”.