human
Question: A species of bird has not been seen since the 1900s and is considered extinct. Which evidence would best disprove the claim that the bird is extinct?

Choices:
A) A bird watcher makes a sketch of the bird.
B) A scientist discovers fossil remains of the bird.
C) A researcher takes a photograph of the bird.
D) A park ranger finds a suitable habitat for the bird.
gpt
The correct answer is 2: A researcher takes a photograph of the bird..