Directional Selection in the Modern Horse Is Demonstrated by

Directional selection in the modern horse is demonstrated by

A) the gradual decrease in size over time.
B) the rapid decrease in size over time.
C) the gradual increase in size over time.
D) the rapid increase in size over time.
E) the extinction of other horse species. Over time, horses gradually increased in overall size as an adaptation to their environment changing from forest to grassland. A directional change such as this indicates directional selection.