After examining the fossil record, scientists have determined that horses today are much larger than their extinct ancestors. For example, Hyracotherium Eohippus, a small horse species that lived 50-60 million years ago, was 60 cm long and 30-38 cm high at the shoulder.

Which of the following conclusions is supported by this information?

Horses in the fossil record are larger than their descendants.

Only fossils from smaller horses are found because only the smaller horses died.

Horses living today have increased their numbers since they first appeared.

Larger horses more readily survived their environment allowing their genetic information to be passed to the next generation.