Answer:
A). Transformation rules.
Step-by-step explanation:
Transformation rules are elucidated as the linguistic rules that are applied to the inside or deep the structure of the sentence in order to produce the appropriate surface meaning and syntactical presentation of the sentence. These rules primarily function to
As per the question, the child trying to use the 'transformation rules' as he is attempting to transform the syntactical formation or representation of the sentence by deeply applying the grammatical rules(use of plurals to irregular verbs as well as nouns, normal past tense). The application of these rules would assist the child to learn to link the two phrase-structure markers that would aid to advance the syntactical structure of the sentence and make it grammatically appropriate and lexically coherent. Thus, option A is the correct answer.