Which Statement About Infant-Directed Speech Is NOT True

Which statement about infant-directed speech is NOT true?

A) Infant-directed speech affects infants' attention to language.
B) Infant-directed speech is necessary for language mastery.
C) Infants learn new words better when the words are presented in infant-directed speech.
D) Infants prefer infant-directed speech to adult-directed speech, even when it is in an unfamiliar language.