Fossils of animals the size of goats were dated at 5 million years old. Similarly, fossils of larger animals were dated at 3 million years old. Both animals were similar in body structure to today's horses. Using these data, which inference can scientists make?Immersive Reader

The animals were probably ancestors of today's horses.

The animals had no relationship to one another.

Today's horses and these animals probably lived together at some time in the past.

Today's horses are faster than these animals were.