Which of the following 36 month old children is demonstrating characteristics associated with a significant delay in language development?
A. Luke uses more nouns than verbs in his speech. HIs use of \wh-\ questions is limited to \what,\ \when,\ and\where.\ B. Cristina has an oral expressive vocabulary of 20 words. She does not combine words in her speech. C. Mario combines words into short sentences. He tends to simplify the production of multisyllabic words, and he sometimes repeats words. D. Tamika uses a new word only after hearing it several times. She can produce similar sounds such as /p/ and /b/ and /s/ and /z/.