Us history : ) what caused the cattle industry to become commercially lucrative? a. cattle grazed in the grasslands--growing large and selling for profit. b. the miners who were moving west needed more meat to eat, so farmers were able to sell their cattle to them for a large profit. c. the government began to regulate the industry which farmers with quality cattle to more easily sell them in the stockyards. d. mr. mccoy e. the men that voted for peoples rights.