Jonathan is a typically developing 4-year-old preschooler. Which of the following structures would MOST LIKELY be in his language repertoire?answer choicesSuggesting intention, emerging mastery of copula "to be," identifies the first sound in a wordPredominantly nouns, calling and requesting action intentions, ritual request gesturesSpurts in word learning, combining two to three words, deletion of possessive -sCombining single words with pointing, 50 words in his expressive vocabulary, words composed of open syllables