A scientist studied four pieces of fossil evidence that show the evolution of the modern-day man. These date back to 2 million years, 1 million years, 0.5 million years,
and 0.25 million years ago. Which fossil is the least similar to the modern-day man?

A:0.25 million years

B: 0.5 million years

C: 1 million years

D: 2 million years