Read the Following Scenario and Answer the Question Below

Read the following scenario and answer the question below.
After meeting with their instructor, Pablo and Johanna know that they need to change their experimental design. They contact a local puppy farm and arrange to do their study with 3-month-old litters of pups from four Irish setters, a total of 24 puppies, consisting of 12 females and 12 males.
-If the puppies in the experimental group gain, on average, 3 pounds more than those in the control group over a 4-month period and seem healthier and more energetic, then ______________

A) there is a probability that the kibble is better for puppies
B) there is a probability that the veterinary diet is better than kibble for puppies
C) they have proven the veterinary diet is best for all dogs
D) there is a probability that the veterinary diet is better than kibble for all dogs
E) they have proven that the kibble diet is best for female dogs