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In the MacArthur-Bates Communicative Development Inventories (CDIs) , parents check off which words their infants understand or produce. Infants' performance is then compared to performance of a large sample of infants of the same age. The CDIs is an example of
Marginal Cost
The expense incurred from the manufacture of an extra single unit of a product or service.
Opportunity Cost
The expense incurred from not choosing the second-best option available during decision-making.
Marginal Cost
The swell in aggregate expenditure due to the production of an additional unit of a product or service.
Environment Pollution
The contamination of the natural environment by harmful substances or activities, leading to adverse effects on ecosystems and human health.
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