Veterinarians Suspect That Enteroliths (Calcifications in the Gut of Horses)

Multiple Choice

Veterinarians suspect that enteroliths (calcifications in the gut of horses) are related to diet-in particular, alfalfa. To investigate this suspicion, a group of veterinarians collected information on the diet of horses and whether the horses developed enteroliths. The table below displays the findings (a case is a horse with enteroliths, a control is without enteroliths) . The probability that a randomly selected horse is fed more than 50% alfalfa, given that it has enteroliths, is:

A) 0.2.
B) 0.23.
C) 0.08.
D) 0.4.