Final answer:
To start training with quantitative terms, a child must know how to count (option B) and understand the relative values of numbers (option C), making the answer option 5, 'Both B and C'.
Step-by-step explanation:
Understanding Quantitative Terms in Child Development
In order for a language-impaired child to begin training with quantitative terms, the child must have a grasp of several foundational concepts. Before moving on to more complex mathematical ideas, it's essential for the child to understand the concepts of one and more-than-one, as these are the building blocks of numerical understanding. Additionally, having the ability to count is crucial, as it facilitates the understanding of numerical progression and the relationship between numbers. Furthermore, the child should comprehend the relative values of numbers, recognizing that some numbers are bigger or smaller compared to others. This knowledge is necessary to grasp the concept of quantity and measure it effectively.
The answer to the question is option 5, 'Both B and C,' meaning that a child must know how to count and understand the relative values of numbers to begin training with quantitative terms effectively.