Vigilant means like cautious
lighthearted means like amusing and entertaining
so I would say its Vigilant
I hope I helped!
D. Scientists were willing to do anything to further their pursuit of knowledge.
This is the best answer.
Hope this helps you.
P.s. I'd appreciate brainliest if u can please
Answer:
Because unlike other scientists at his time, he believed the Earth was the center of the universe. The opposite of the geocentric model is the heliocentric, where the Sun is the center of the universe (correct model).
D would probably be the most accurate.
