Adding a third bathroom to a home returns more than it costs; adding a fourth returns less. Which principle is illustrated?

Correct Answer

B) Increasing and decreasing returns

Why this is correct: The principle of increasing and decreasing returns states that successive investments add value at an increasing rate up to an optimal point (increasing returns), after which each additional dollar adds less value than it costs (decreasing returns). The third bathroom is before the point; the fourth is after. Why the other choices are wrong: "Conformity and its penalties" is incorrect; conformity relates to similarity, not investment productivity. "Anticipation of future demand" is wrong; no future change is discussed. "Externalities acting on the site" is false; externalities are outside influences. Exam tip: Diminishing returns mark the boundary of over-improvement in highest and best use analysis.