D
Below is a question with multiple-choice answers. Choose the correct option based on your reasoning.

### Question:
A person named Leonardo da Vinci studied many things including animals, geology, clouds, and flight. His study of birds helped him design the first parachute. Everything he saw made him ask how and why. Which human quality most likely made this person want to study many different things?

### Choices:
A. duty
B. wisdom
C. kindness
D. curiosity

### Answer:
