Which of the following illustrates scarcity? A. Igot a new dress from my mother. B. Mary loves watching movies. C. Ron will travel to New York City for Thanksgiving. D. Megan wants to buy a CD that costs 25 but has only 10 to spend.

The correct answer is D. Megan wants to buy a CD that costs $25 but has only $10 to spend.<br /><br />Scarcity refers to the limited availability of resources compared to unlimited wants and needs. In this case, Megan has a limited amount of money ($10) but wants to buy a CD that costs $25, illustrating the concept of scarcity.