PLEASE I WILL GIVE BRAINLIEST Which example represents an individual vs. individual conflict in “The Ornithopter”?

a. Leonardo has an opportunity to make a good living, but it involves making weapons of war, which he believes is "a beastly madness."

b. The duke imagines the ornithopter as a weapon of war, while Leonardo imagines it as a thing of beauty and innovation.

c. The technology needed to make many of Leonardo's inventions is not available during his lifetime.

d. Leonardo struggles in making a decision about doing work for a purpose he does not agree with.