A scientist studied four rock fossils that show evolution of the modem-day horse dating back to 35 million years. 15 million years, 8 million years, and 1 million years ago. Which rock fossil is most similar to the modem-day horse?A: 35 million years B:15 million years C:8 million years D:1 million years​
The one dated back to about 1 million years would most likely have more similarities to the modern day horse, so the answer should be the rock fossil which is 1million years old.