The answer is D. Assessment is appropriate for infants and toddlers. It's actually recommended. Screenings of the children is not going to document their growth. There is technically a reliable way. And recording developmental milestones like their first word and when they start walking, crawling and running is extremely crucial in a child's learning process.
Accountants only concern themselves with direct costs which involve things like the cost of materials, rent, and labor for instance. This profit is aptly named "accounting profit".
Economists consider those costs as well, but they also include indirect costs such as opportunity costs of other investments. Recall that opportunity cost is the cost of what you give up if you make a certain decision.
For instance, if a car factory makes 4 door sedans, but it could be making more money with SUVs, then the opportunity cost is high and the economic profit is lower compared to the accounting profit.
The smooth mountain rock surface makes a higher runoff rate than a vegetation surface. Differ form soil; mountain rocks have small fractures in the surface that absorb a little water but not that much.