Answer:
The answer is indeed letter C. understatement.
Step-by-step explanation:
An understatement, also called euphemism, is a figure of speech. It describes or presents something as being less important than what it really is. For instance, suppose you travel to Rio de Janeiro and the temperature outside is 40°C (104°F); you say, "It's a bit warm today." That description is an understatement since the day is not merely warm. It is very hot.
Any person, probably even a rich one, would feel more than just pleased if they got a brand-new car full of 100-dollar bills. That is something to make anyone scream with excitement and cry in disbelief since it is most unlikely to happen. A perfume or a 50-dollar bill for a present could make someone pleased.