The correct answer is option C. "Live cows could be transported by train".
Explanation:
When the First Transcontinental Railroad was opened in 1869, the cattle industry took advantage of it for being a much faster and safer way of transportation between the west and east territories. The railroad was particularly helpful in transporting live cows by train. By using the railroad, sending cattle to certain places was safer as it helped to avoid the risk that natives or other American people could steal them.
