The ratio of cows to chickens on Tweedy's Farm is 2:7. Which farms have a greater ratio of cows to chickens than Tweedy's Farm? Select all that apply.

a Steller Stover's Farm 3 cows for 5 chickens

b Awesome Ansel's Farm 1 cow for every 5 chickens

c Happy Hall's Farm 1 cow for every 3 chicken

d Jumping Jack Jones Farm 3 cows for every 8 chickens ​