Final Answer:
The earliest form of intraverbal training is A. answering questions.
Step-by-step explanation:
Intraverbal training involves teaching an individual to respond appropriately to verbal stimuli, such as questions or statements. The earliest form of intraverbal training is captured by option A, "answering questions." This foundational skill represents the ability to generate relevant and coherent responses in a conversational context, demonstrating a grasp of language comprehension and expression.
To understand why answering questions is considered the earliest form of intraverbal training, we can delve into the developmental progression of language acquisition. Responding to one's name (option B) is indeed a crucial early milestone, showcasing basic auditory awareness. However, the leap to answering questions involves a more advanced cognitive process. It requires the integration of various language components, including vocabulary, syntax, and contextual understanding. This progression aligns with the natural developmental trajectory of language skills in individuals.
On the other hand, option C, "song fill-ins," involves a different aspect of language engagement, focusing on memorization and completion of lyrics within a structured format. While this can be a valuable activity, it doesn't inherently capture the essence of intraverbal training, which centers on the ability to navigate open-ended verbal interactions. Therefore, the ability to answer questions stands out as the primary indicator of early intraverbal proficiency, marking a critical step in the complex journey of language development.